An unhandled exception of type 'System.NotSupportedException' occurred in Microsoft.SPOT.Hardware.Usb.dll

I finally got together a Visual Studio C# 2010 Express, .net micro framework 4.1 and Netduino SDK 4.1 for my Netduino Mini

When debugging the project, I get the error: An unhandled exception of type ‘System.NotSupportedException’ occurred in Microsoft.SPOT.Hardware.Usb.dll

Please let me know how to fix this,