Hi, Since Parallels 3.0 features experimental DirectX Shader Support, I tried to run XNA. Game.Run() triggers the following exception: System.ArgumentException wurde nicht behandelt. Message="The device name is not valid. Device names are in the form \\\\.\\\\DEVICE1\r\nParameter name: screenDeviceName" Source="Microsoft.Xna.Framework.Game" ParamName="screenDeviceName" StackTrace: at Microsoft.Xna.Framework.WindowsGameWindow.ScreenFromDeviceName(String screenDeviceName) at Microsoft.Xna.Framework.WindowsGameForm.ResizeWindow(String screenDeviceName, Int32 clientWidth, Int32 clientHeight, Boolean center) at Microsoft.Xna.Framework.WindowsGameForm.EndScreenDeviceChange(String screenDeviceName, Int32 clientWidth, Int32 clientHeight) at Microsoft.Xna.Framework.WindowsGameWindow.EndScreenDeviceChange(String screenDeviceName, Int32 clientWidth, Int32 clientHeight) at Microsoft.Xna.Framework.GraphicsDeviceManager.ChangeDevice(Boolean forceCreate) at Microsoft.Xna.Framework.GraphicsDeviceManager.Microsoft.Xna.Framework.IGraphicsDeviceManager.CreateDevice() at Microsoft.Xna.Framework.Game.Run() at ParallelsTest.Program.Main(String[ args) in C:\Users\zziemke\Documents\Visual Studio 2005\Projects\XNA\ParallelsTest\Program.cs:line 14 Is the XNA Team informed about this issue? Any workarounds? Thanks in advance zziemke

This is not an XNA issue. This is a issue with operating system virtualization. Parallels does not support general DirectX it seems. I would guess that since they have a definitive list of 3D games (all of which appear to be at least a few years old), they worked something out with just those games. The error you are getting is because your game is unable to get access to the graphics device. If you want support on this, please contact Parallels since it is their issue.