My guess is that unless the HD makes weird noises when you turn it on, it's just the case/firewire interface that's the problem. I'm almost positive that if you installed it directly into the motherboard it would work just fine. You might also try just going to "add new hardware" and see if it can locate the drive. I have this weird glitch on my system (WinXP Pro) where it will not recognize my 4th HD when it first boots up. When I initiate the "add new hardware" wizard, somehow it magically pops up on My Computer before the wizard actually starts searching for hardware. Anyway, let us know what happens.