1. Go to this website link and download the dll. [link=http://www.driverskit.net/dll/get/494.html]http://www.driverskit.net/dll/get/494.html[/link]
2. Place the file in c:\windows\system32

This is common to Vista since Microsoft has decided to stop including legacy drivers for many older 3D rendering games and cad programs.

Let us know how it works out for you.

Good luck!