I'm learning to program directx using the 8.1 SDK, and have done the first few tutorials of a book I am reading. I think DirectX is installed fine on my machine as I've run all the diagnostics tools fine, and direct3D games work fine. However, the textured photo that should appear in my first program doesn't appear when I run it - it works fine on the 3 or 4 other computers I've tried it on - but not mine! Anyone have any ideas what could be wrong? Cheers.