on the same screen Rudster brought you too, you should see something like "enable VGA mode" That usually fixes this when I disable my Video card.
You can also try setting your BIOS to look and see if there is a way to use your new PCI card instead of the AGP (Yes, you did get that right) as the main video device. Plug your monitor in there and see if that helps.
"as a fanboy i refuse to admit it and will pull countless things out of my butt to disprove it"
Team Thelegorm! Total Kills: 21 (i iz in uor profile, editsing your sigz)