yone...

I need a bit of advice. I bought a Viewsonic VP201s yesterday to replace my work CRT. I wanted to use the DVI input while I'm waiting for a Matrox P650 to arrive, so I hooked up and extra P450 PCI card that has a DVI output. I set the BIOS to VGA boot from PCI, which it does. The monitor loses the signal just as the XP Welcome screen appears. Of course, I can switch the input to D-Sub and continue with my AGP card, but I'm curious why the signal to the DVI port of the monitor would disappear at the end of the boot cycle. I'm using the latest Matrox drivers from 9/04. Can anyone tell me what I'm missing? Thanks...