Hallo Jamie
I had the same thing happen to me. To get over this I removed the smartdevices and added them in again. This is described in the following article
http://msdn.microsoft.com/mobility/...html/grfUsingEmulatorInSmartDeviceProjects.as
attached is the part you need to do..
have fun..
Nigel..
To remove smart device programmability
In Windows Control Panel, click Add or Remove Programs.
Select your installation of Microsoft Visual Studio .NET, and then click Change/Remove.
In the Visual Studio .NET Setup wizard, click Visual Studio .NET.
On the Visual Studio .NET Maintenance page, click Add or Remove Features.
On the Visual Studio .NET Options page, clear the Smart Device Programmability check box under Visual Basic .NET and Visual C# .NET.
Click Update Now, and restart the development computer.
To reinstall smart device programmability
Repeat the preceding procedure to display the Visual Studio .NET Options page.
Select the Smart Device Programmability check box under Visual Basic .NET and Visual C# .NET.
Click Update Now.