K7vm3 bios hangs on start with pexagon storeit drive in USB

This computer has a k7vm3 mother board that was put in as a replacement several years ago, and has an upgrade version of XP Professional SP3. It had BIOS version 1.3 on it and has been updated to 1.5. Before the update, when a Pexagon Store-It Colors 160 gb drive 2.5" HDD on a USB port is plugged in, the system hangs on start up, apparantly before the sequence where would detect a floppy or CD rom to boot from. I have tried it both ways with the boot up sequence set to detect other sources either off or on in the BIOS settings. It still hangs after updating everything possible, including reinstalling the drivers for the USB ports. Pexagontech has been NO help on solving this issue. This same drive worked just fine on another computer running XP Home edition.