did you install the software first? I had a similar problem and THEN I read the manual which says you install the software first and then the hardware. I suppose that seems obvious, but at the time, for some reason, I did it the other way around. At any rate, I removed the Cyberstorm, reinserted the old GVP '040 card, rebooted, and installed the Phase5 software and then turned off the machine and reinstalled the card. It booted fine after that.