Why does my AGP card registers as a PCI Device?

I had bought an ATI Radeon HD 2600 pro, and I tried installing the driver, and that didn't work. So I went to the device manager, and saw that I had no display adapter. but I had a new thing called other devices, and under that it said that there was two things, a PCI Device, and a Video Controller (VGA Compatable). I clicked on the PCI and it said that it's location is at PCI Bus 1. I've checked, and found that I have no PCI Slots for my video cards, I have an AGP slot. Can someone help me find the source of this problem, and the visiontek support line is closed this weekend.