I've found a similar problem with Openstreetmaps, getting a (403) returned.  It seems that OSM is objecting to a refererurl being sent in the http header.

I've found the same issue in my own software which uses Gmap and setting RefererUrl to an empty string fixes the issue.

Gerard

Its AI traffic generated by MyTraffic 2010. 

Windows language is English (United Kingdom), FSX SP2 English (United States), connecting using Simconnect.  IE 8, ATI4850 graphics

17:57:43 PlanG constructor
17:57:43 executableFolder: E:\Flight Sim Stuff\Utilities\Plan-G_0\Plan-G
17:57:43 Starting Plan-G, build 0.9.1.423
17:57:43 FSX is installed
17:57:43 FSX database is built
17:57:43 Selected data set is FSX
17:57:47 Starting map
17:57:48 Initialisation complete.
17:57:49  DEBUG: count=8
17:57:59 Opening Flight Plan
17:58:00 NodeList Item#0 Descr
17:58:00 NodeList Item#1 FlightPlan.FlightPlan
17:58:00 Waypoint = AirportN51° 47' 6.000282",E1° 7' 47.998052",+000036.00EGSQ
17:58:00 Waypoint = AirportN52° 28' 4.999618",W0° 15' 3.000534",+000022.00EGSF
17:58:00 MEF Metres = 158 Feet = 518 Rounded == 600
17:58:00 Plan: TrueBrg=309.403804062457 var=2 MagBrg=311 dist=65.3
17:58:00 CalculateRoute took 0.328 seconds
17:58:00 Drawing Flight Plan
17:58:00 DisplayFlightPlanDetail. MoveMap = True nodes = 2
17:58:02  DEBUG: count=6
17:58:02 UpdatePlanWeather testing IsConnected
17:58:08 RibbonButton_Click_ConnectFS
17:58:08 SimConnect.Connect
17:58:08 SimConnect.Connect - Remote. Mode = IPv4 Server = 127.0.0.1 Port = 0
17:58:08 Connected to FSX
18:55:48 RibbonButton_Click_DisconnectFS
18:55:48 SimConnect.Disconnect
18:55:49  DEBUG: removeAircraftOverlays

Great program, initially had some problems crashing when connecting to FSX but reinstalled .net and it seems to be working fine now.

One little query, looking at traffic using the menu on right hand side, the reg number doesn't show a hyphen after the first letter, instead a small box.  I'm using an up-to-date version of winxp sp3 and can't recall seeing this problem with any other software.  Not a big issue, just curious as to what might be causing it.

Thanks
Gerard