System Won't Start with New PCI Video Card

I have a new Optiplex 330 and wanted to add a video card with dual-monitor support. It has one PCIe slot (used) and 2 PCI slots. I purchased a video card that I have used in systems in the past, but when I put it in the slot, the system won't even boot. The power light blinks amber and that's it. Take out the card and everything works fine.

I exchanged the card for another and have the same problem. The card only requires a 250W power supply, so that shouldn't be an issue. Someone suggested setting the video options to auto in the BIOS, but I don't think it relates to any BIOS settings because the system never even powers up. I may need to do that to get the video working, but I need to get the system started up before I get to that.

Any ideas?

Thanks.

Angela