I can't view the zip file because I am not a member there. If you want you can upload the zip here and I can look. My guess is it is either making direct calls to DirectX, or it is using MDX (managed direct x) which is now discontiuned in favor of XNA (Managed Direct X 2.0 was cancelled and rolled into XNA)

You can probably still get the 1.1 version of MDX though if you look around MS site for a download.