voodoo3 3500tv help

Salutations,
Ok folks, I've got to be missing something stupid here. I have an AMD K6/2 450 on a asus p5a motherboard. 256 megs of mem, and a voodoo3 3500tv. The card so far works great. Go to play motorcross madness and it turns my monitor black, then my green light on the monitor goes to orange, kinda like it ain't getting power. I've uninstalled motorcross madness and re-installed. Same thing. Installed directX 7 thinking that would solve it, and nothing. This is also happening when it goes to play movies in baulders gate. I can play blitz fine and haven't tried any other games. The games also worked fine when I had my quantum raven in. Any ideas?