I've got it working now. Thanks for your help and patience. This is great.

The Windows log was from the Plan-G PC (which is Windows XP)

The IP address of the FSX PC (Windows 7) is fe80::35df:c64f:4201:c8be
The IP address of the Plan-G PC is 192.168.1.104
FSX is running and is SP2/Acceleration

8:52:30 AM PlanG constructor
8:52:30 AM executableFolder: C:\Downloads\Plan-G_0.9.1\Plan-G
8:52:31 AM Starting Plan-G, build 0.9.1.423
8:52:31 AM FS9 is installed
8:52:31 AM Selected data set is FS9
8:52:31 AM Starting map
8:52:31 AM Initialisation complete.
8:54:51 AM PlanG constructor
8:54:51 AM executableFolder: C:\Downloads\Plan-G_0.9.1\Plan-G
8:54:51 AM Starting Plan-G, build 0.9.1.423
8:54:51 AM FS9 is installed
8:54:52 AM Selected data set is FS9
8:54:52 AM Starting map
8:54:52 AM Initialisation complete.
8:55:29 AM RibbonButton_Click_ConnectFS
8:55:29 AM SimConnect.Connect
8:55:29 AM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.254 Port = 4506
8:55:49 AM SimConnect remote connection timed out
8:56:09 AM  DEBUG: removeAircraftOverlays
8:56:13 AM RibbonButton_Click_DisconnectFS
8:56:13 AM SimConnect.Disconnect
8:56:14 AM  DEBUG: removeAircraftOverlays
8:56:16 AM RibbonButton_Click_ConnectFS
8:56:16 AM SimConnect.Connect
8:56:16 AM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.254 Port = 4506
8:56:26 AM RibbonButton_Click_DisconnectFS
8:56:26 AM SimConnect.Disconnect
8:56:27 AM  DEBUG: removeAircraftOverlays
8:56:36 AM SimConnect remote connection timed out
8:56:43 AM  DEBUG: removeAircraftOverlays
9:07:47 AM PlanG constructor
9:07:47 AM executableFolder: C:\Downloads\Plan-G_0.9.1\Plan-G
9:07:48 AM Starting Plan-G, build 0.9.1.423
9:07:48 AM FS9 is installed
9:07:48 AM Selected data set is FS9
9:07:48 AM Starting map
9:07:48 AM Initialisation complete.
9:08:18 AM RibbonButton_Click_ConnectFS
9:08:18 AM FSUIPC.Connect
9:08:19 AM Error opening FSUIPC: FSUIPC.FSUIPCException: FSUIPC Error #2: FSUIPC_ERR_NOFS. Cannot find FSUIPC or WideFS running on this machine.
   at FSUIPC.FSUIPCConnection.Open(FlightSim RequiredFlightSimVersion)
   at FSUIPC.FSUIPCConnection.Open()
   at FS.FSUIPC.Connect()
9:08:55 AM RibbonButton_Click_ConnectFS
9:08:55 AM FSUIPC.Connect
9:08:55 AM Error opening FSUIPC: FSUIPC.FSUIPCException: FSUIPC Error #2: FSUIPC_ERR_NOFS. Cannot find FSUIPC or WideFS running on this machine.
   at FSUIPC.FSUIPCConnection.Open(FlightSim RequiredFlightSimVersion)
   at FSUIPC.FSUIPCConnection.Open()
   at FS.FSUIPC.Connect()
9:09:10 AM RibbonButton_Click_ConnectFS
9:09:10 AM SimConnect.Connect
9:09:10 AM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.254 Port = 4506
9:09:30 AM SimConnect remote connection timed out
9:09:32 AM  DEBUG: removeAircraftOverlays
9:18:41 AM PlanG constructor
9:18:41 AM executableFolder: C:\Downloads\Plan-G_0.9.1\Plan-G
9:18:41 AM Starting Plan-G, build 0.9.1.423
9:18:41 AM FS9 is installed
9:18:42 AM Selected data set is FS9
9:18:42 AM Starting map
9:18:42 AM Initialisation complete.
9:19:07 AM RibbonButton_Click_ConnectFS
9:19:07 AM SimConnect.Connect
9:19:07 AM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
9:19:27 AM SimConnect remote connection timed out
9:19:30 AM  DEBUG: removeAircraftOverlays
9:54:56 AM PlanG constructor
9:54:56 AM executableFolder: C:\Downloads\Plan-G_0.9.1\Plan-G
9:54:58 AM Starting Plan-G, build 0.9.1.423
9:54:58 AM FS9 is installed
9:54:58 AM Selected data set is FS9
9:54:58 AM Starting map
9:54:59 AM Initialisation complete.
9:55:16 AM RibbonButton_Click_ConnectFS
9:55:16 AM SimConnect.Connect
9:55:16 AM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
9:55:36 AM SimConnect remote connection timed out
9:55:41 AM  DEBUG: removeAircraftOverlays
1:46:05 PM PlanG constructor
1:46:05 PM executableFolder: C:\Downloads\Plan-G_0.9.1\Plan-G
1:46:10 PM Starting Plan-G, build 0.9.1.423
1:46:10 PM FS9 is installed
1:46:10 PM Selected data set is FS9
1:46:10 PM Starting map
1:46:11 PM Initialisation complete.
1:46:24 PM RibbonButton_Click_ConnectFS
1:46:24 PM SimConnect.Connect
1:46:24 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
1:46:44 PM SimConnect remote connection timed out
1:46:47 PM  DEBUG: removeAircraftOverlays
1:50:30 PM PlanG constructor
1:50:30 PM executableFolder: C:\Downloads\Plan-G_0.9.1\Plan-G
1:50:30 PM Starting Plan-G, build 0.9.1.423
1:50:30 PM FS9 is installed
1:50:30 PM Selected data set is FS9
1:50:30 PM Starting map
1:50:30 PM Initialisation complete.
1:50:38 PM RibbonButton_Click_ConnectFS
1:50:38 PM SimConnect.Connect
1:50:38 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
1:50:58 PM SimConnect remote connection timed out
1:51:07 PM  DEBUG: removeAircraftOverlays
2:22:05 PM PlanG constructor
2:22:05 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
2:22:06 PM Starting Plan-G, build 0.9.1.423
2:22:06 PM FS9 is installed
2:22:06 PM Selected data set is FS9
2:22:06 PM Starting map
2:22:06 PM Initialisation complete.
2:22:10 PM RibbonButton_Click_ConnectFS
2:22:10 PM SimConnect.Connect
2:22:10 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
2:22:31 PM SimConnect remote connection timed out
2:22:41 PM  DEBUG: removeAircraftOverlays
2:29:14 PM PlanG constructor
2:29:14 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
2:29:14 PM Starting Plan-G, build 0.9.1.423
2:29:14 PM FS9 is installed
2:29:14 PM Selected data set is FS9
2:29:14 PM Starting map
2:29:14 PM Initialisation complete.
2:29:19 PM RibbonButton_Click_ConnectFS
2:29:19 PM SimConnect.Connect
2:29:19 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
2:29:39 PM SimConnect remote connection timed out
2:29:42 PM  DEBUG: removeAircraftOverlays
2:31:10 PM PlanG constructor
2:31:10 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
2:31:10 PM Starting Plan-G, build 0.9.1.423
2:31:10 PM FS9 is installed
2:31:10 PM Selected data set is FS9
2:31:10 PM Starting map
2:31:11 PM Initialisation complete.
2:31:16 PM RibbonButton_Click_ConnectFS
2:31:16 PM SimConnect.Connect
2:31:16 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
2:32:47 PM PlanG constructor
2:32:47 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
2:32:47 PM Starting Plan-G, build 0.9.1.423
2:32:47 PM FS9 is installed
2:32:47 PM Selected data set is FS9
2:32:47 PM Starting map
2:32:47 PM Initialisation complete.
2:32:52 PM RibbonButton_Click_ConnectFS
2:32:52 PM SimConnect.Connect
2:32:52 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
2:33:12 PM SimConnect remote connection timed out
2:43:29 PM  DEBUG: removeAircraftOverlays
2:45:06 PM PlanG constructor
2:45:06 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
2:45:07 PM Starting Plan-G, build 0.9.1.423
2:45:07 PM FS9 is installed
2:45:07 PM Selected data set is FS9
2:45:07 PM Starting map
2:45:07 PM Initialisation complete.
2:45:11 PM RibbonButton_Click_ConnectFS
2:45:11 PM SimConnect.Connect
2:45:11 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
2:45:31 PM SimConnect remote connection timed out
2:45:33 PM  DEBUG: removeAircraftOverlays
6:58:10 PM PlanG constructor
6:58:10 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
6:58:13 PM Starting Plan-G, build 0.9.1.423
6:58:15 PM FS9 is installed
6:58:15 PM Selected data set is FS9
6:58:15 PM Starting map
6:58:15 PM Initialisation complete.
7:25:47 PM PlanG constructor
7:25:47 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
7:25:48 PM Starting Plan-G, build 0.9.1.423
7:25:48 PM FS9 is installed
7:25:48 PM Selected data set is FS9
7:25:48 PM Starting map
7:25:48 PM Initialisation complete.
7:25:56 PM RibbonButton_Click_ConnectFS
7:25:56 PM SimConnect.Connect
7:25:56 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
7:26:16 PM SimConnect remote connection timed out
7:26:23 PM  DEBUG: removeAircraftOverlays
7:38:19 PM PlanG constructor
7:38:19 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
7:38:19 PM Starting Plan-G, build 0.9.1.423
7:38:19 PM FS9 is installed
7:38:19 PM Selected data set is FS9
7:38:19 PM Starting map
7:38:20 PM Initialisation complete.
7:39:15 PM RibbonButton_Click_ConnectFS
7:39:15 PM SimConnect.Connect
7:39:15 PM SimConnect.Connect - Remote. Mode = IPv6 Server = fe80::35df:c64f:4201:c8be Port = 4506
7:42:21 PM PlanG constructor
7:42:21 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
7:42:21 PM Starting Plan-G, build 0.9.1.423
7:42:21 PM FS9 is installed
7:42:21 PM Selected data set is FS9
7:42:21 PM Starting map
7:42:21 PM Initialisation complete.
7:43:10 PM RibbonButton_Click_ConnectFS
7:43:10 PM SimConnect.Connect
7:43:10 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
7:43:30 PM SimConnect remote connection timed out
7:43:35 PM  DEBUG: removeAircraftOverlays
7:45:28 PM PlanG constructor
7:45:28 PM executableFolder: C:\Plan-G_0.9.1\Plan-G
7:45:31 PM Starting Plan-G, build 0.9.1.423
7:45:31 PM FS9 is installed
7:45:31 PM Selected data set is FS9
7:45:31 PM Starting map
7:45:32 PM Initialisation complete.
7:45:39 PM RibbonButton_Click_ConnectFS
7:45:39 PM SimConnect.Connect
7:45:39 PM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
7:46:00 PM SimConnect remote connection timed out
7:46:04 PM  DEBUG: removeAircraftOverlays
11:14:02 AM PlanG constructor
11:14:02 AM executableFolder: C:\Plan-G_0.9.1\Plan-G
11:14:05 AM Starting Plan-G, build 0.9.1.423
11:14:05 AM FS9 is installed
11:14:05 AM Selected data set is FS9
11:14:05 AM Starting map
11:14:06 AM Initialisation complete.
11:14:27 AM RibbonButton_Click_ConnectFS
11:14:27 AM SimConnect.Connect
11:14:27 AM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
11:14:48 AM SimConnect remote connection timed out
11:15:02 AM  DEBUG: removeAircraftOverlays
11:20:50 AM PlanG constructor
11:20:50 AM executableFolder: C:\Plan-G_0.9.1\Plan-G
11:20:50 AM Starting Plan-G, build 0.9.1.423
11:20:51 AM FS9 is installed
11:20:51 AM Selected data set is FS9
11:20:51 AM Starting map
11:20:51 AM Initialisation complete.
11:20:56 AM RibbonButton_Click_ConnectFS
11:20:56 AM SimConnect.Connect
11:20:56 AM SimConnect.Connect - Remote. Mode = IPv4 Server = 192.168.1.104 Port = 4506
11:21:16 AM SimConnect remote connection timed out
11:21:21 AM  DEBUG: removeAircraftOverlays

I hope this helps:

#Version: 1.5
#Software: Microsoft Windows Firewall
#Time Format: Local
#Fields: date time action protocol src-ip dst-ip src-port dst-port size tcpflags tcpsyn tcpack tcpwin icmptype icmpcode info path

2010-04-30 11:20:51 OPEN UDP 192.168.1.104 192.168.1.254 59996 53 - - - - - - - - -
2010-04-30 11:20:51 OPEN TCP 192.168.1.104 74.125.65.147 1738 80 - - - - - - - - -
2010-04-30 11:21:04 DROP UDP 192.168.1.104 255.255.255.255 68 67 328 - - - - - - - RECEIVE
2010-04-30 11:21:06 OPEN UDP 192.168.1.104 192.168.1.254 57169 53 - - - - - - - - -
2010-04-30 11:21:06 OPEN TCP 192.168.1.104 65.55.94.222 1740 443 - - - - - - - - -
2010-04-30 11:21:04 OPEN UDP 192.168.1.104 192.168.1.254 56680 53 - - - - - - - - -
2010-04-30 11:21:25 CLOSE TCP 192.168.1.104 74.125.65.147 1738 80 - - - - - - - - -
2010-04-30 11:21:32 OPEN UDP 192.168.1.104 192.168.1.254 58243 53 - - - - - - - - -
2010-04-30 11:21:40 DROP TCP 74.125.65.147 192.168.1.104 80 1738 40 AR 2652425087 4283838797 0 - - - RECEIVE
2010-04-30 11:22:07 CLOSE UDP 192.168.1.104 192.168.1.254 59996 53 - - - - - - - - -
2010-04-30 11:22:07 CLOSE UDP 192.168.1.104 192.168.1.254 56680 53 - - - - - - - - -
2010-04-30 11:22:07 CLOSE UDP 192.168.1.104 192.168.1.254 57169 53 - - - - - - - - -
2010-04-30 11:22:38 CLOSE TCP 192.168.1.104 65.55.94.222 1740 443 - - - - - - - - -
2010-04-30 11:22:42 OPEN UDP 192.168.1.104 192.168.1.254 55852 53 - - - - - - - - -
2010-04-30 11:22:43 OPEN TCP 192.168.1.104 65.55.11.179 1741 80 - - - - - - - - -
2010-04-30 11:22:43 OPEN TCP 192.168.1.104 65.55.11.179 1742 80 - - - - - - - - -
2010-04-30 11:22:54 DROP TCP 65.55.94.222 192.168.1.104 443 1740 40 AR 1986387511 1775273647 0 - - - RECEIVE
2010-04-30 11:23:07 CLOSE UDP 192.168.1.104 192.168.1.254 58243 53 - - - - - - - - -

Nothing works. Any other suggestions? One thing confuses me however; on page 57 of the manual under section 10.2.1
for an IPv4 protocol it says "if you choose to use the example above, then usually, only the computer address needs to be changed to match your FSX PC's IP address." That's what I did as shown in the above post.

I'm Not sure I know what you mean. I entered the addresses(192.168.1.104) for an IPv4 in both places.

I'm at a loss. I changed the addresses as you suggested, but still unable to connect to FSX. I have both FSX and FS9 installed on different computers, and have no trouble running Plan-G as a stand alone for either flight sim. I just can't show FSX on a separate monitor.

Still having problems. This is my SimConnect.xml:

<?xml version="1.0" encoding="Windows-1252"?>
<SimBase.Document Type="SimConnect" version="1,0">
   <Descr>SimConnect</Descr>
   <Filename>SimConnect.xml</Filename>
   <Disabled>False</Disabled>
   <SimConnect.Comm>
     <Disabled>False</Disabled>
     <Protocol>IPv4</Protocol>
     <Scope>local</Scope>
     <MaxClients>64</MaxClients>
     <Address>fe80::35df:c64f:4201:c8be</Address>
     <Port>4506</Port>
   </SimConnect.Comm>
</SimBase.Document>     
 
The address is set to the IP address of the FSX PC which is on Windows 7. I configured the SimConnect settings in Plan-G as follows:
 
  Network Mode:      IPv4
  FSX Computer:       fe80::35df:c64f:4201:c8be
  Server Port/Pipe:    4506 

Is there anything I need to correct or add. Thanks in advance.

Richard

If I have FSX installed on Windows 7 and Plan-G installed on my other computer which uses Windows XP, which communication protocal should I use? IPv4 or iPv6. Thanks