I can only offer what my USB2.0 HDD is detected as...

1) It should show in Unplug or Eject Hardware as "USB Mass Storage Device" as your manual says...
2) It should show up as a drive letter (normal HDD, not removable media) after formating it. Also if it is preformated, as many HDDs are.

I never ran into the problems you had when I connect it to Windows 2000 systems. They automatically installed it after detecting it. So, like nihil suggested, reinstall the drivers. After you get Windows to detect the ATA to USB Adapter thing, then finding the HDD shouldn't be a problem.


Edit: Just incase you didn't, make sure you plug in the External HDD Case into AC Outlet - there is no way a 500miliwatt USB Port can supply enough power to power a full size HDD.