The graphic cards are pretty recent. I think Nvidia 8800 or higher. This seems really not to be  a hardware error since otherprogramms run fine. I guess that there are some Problems with the importer of the xna framework.or maybe with the Visual Studio Projectfiles, since the versions are slightly different (only servicepacks are different).

Nope Graphic Cards are Dirfferent Drivers too. Aswell as the Visual Studio Version. But I guess that its not a driver issue since some other Projects do work correctly even though they use the same models and even the same sourcecode.

None any Idea?

Hi, We use XNA for a university gameproject. XNA is quite easy and ok to use. But there is one very anoying problem. Some Models dont display on some special computers or display different(without texture or just as two planes).I have not been able to track down the problem to something. I had two Identical Projects(source and model). One worked ...