are you all clear in dx diag? 1. Click Start, select Run or Search(vista) 2. Type dxdiag 3. On the lower right you'll see a button "Save all information" - click it 4. Save the dxdiag.txt to your desktop 5. Attach it to your post and which drivers are you using, problems using dx10 are usually settings related try the games own forums known issues stickies. (am working so cant check for you! sorry) click here
click here if there isnt register and post your thread.