Problem with 2nd Monitor...

[Shilly]

I just bought a new PCI card because my AGP card only has one monitor port. After installing the video card myself, I restarted by computer with one monitor hooked up to the AGP card and another connected to the PCI card. Upon start-up, the 2nd monitor remained black, but the one attached to the AGP card was fine. Is this because I still need to install the drivers for the new video card? I put in the CD for the drivers, but it says that I will need to remove previous graphics drivers before I continue. Since I plan on using my AGP card to drive all video and just need the PCI card for a 2nd monitor, is this necessary?

Any help will be greatly appreciated.