I wanted to set this up, but it ain't workin.

I have 2 video cards: one that's integrated into the motherboard and an old VooDoo3/2000. When I plug in the voodoo, and I hook up both monitors to both video cards, only the voodoo displays a picture. The power is on, it's all hooked up right.

When I go to display, I only see one monitor, instead of two. Any pointers?