Okay ... I did a little quick searching on this product.
It would appear that it is totally plug 'n' play once the drivers are installed (not required for XP).
This would make it appear to be a hardware problem.
We can presume that the USB connector is functioning, as it is detected.
Does the hard disk power up?
Does it sound like it's spinning normally ?
Do the LED's light up (I think it has some somewhere) ?
ALso ... if you can't take it somewhere to test it, try testing it with a CD-drive or anoter hard disk.
