Before I begin I should mention I am using the trial version of Silverlight 4 controls with visual studio 2010. I followed the directions on the telerik blog (http://blogs.telerik.com/vesselingeorgiev/posts/09-12-19/telerik_radmap_for_silverlight_openstreetmap_provider.aspx) and ran my code but no tiles show.
I also tried the sample project linked in the above blog post, but still no tiles show. I do get to see the telerik control + zoom, pan and map mode UI elements but no tiles. The trial control also displays the 'trial version' overlay which disappears after I click on the control.
However, in visual studio in the xaml preview the map tiles always show (see attached screenshots).
First Screenshot : Visual Studio XAML Preview + Xaml code for the sample project.
Second Screenshot: Running with the trial version overlay, no tiles.
Third Screenshot: After clicking on the control, the trial overlay disappears but still no tiles.
What could I be doing wrong or missing?