Ultra USB Hard Drive Enclosure driver fail

I've got a Ultra USB Hard Drive Enclosure which worked just fine (and still does) on my XP computer. It is not recognized by Vista x64 on my new computer. Ultra insists it works in x64 and that I should call Microsoft. Before I try contacting MS I figured I'd try here first.

Screenshots @ Flickr: Search Travelin' Librarian's photostream

Thanks!
Michael

Ultra pointed me to Microsoft. Microsoft pointed me back to Ultra. Ultra them pointed me to the chipset manufacturer who doesn't supply end-user support. In the end I tried a Firewire cable and the drive now works fine. Whatever.