Regis

I'm trying to install PG3:SE, but it isn't working. I tried clicking "Install" on the autorun menu. I tried using the setup.exe from the CD. The same thing keeps happening... the mouse pointer turns into an hourglass for about 2 or 3 seconds, and that's it. Nothing else happens. I had the same problem trying to run the PG3D and PG3:SE demos from GameSpot. I have a P4 1.9GHz and NVIDIA 64MB DDR GeForce3 Ti200. Does anyone have any suggestions?