Adding USB Hard drive on Windows 2000 server causes BSOD

I have a Dell PowerEdge 2500 running Windows 2000 Server SP4. If I plug in a Lacie USB hard drive to the on-board USB port (I also tried a Western Digital USB hard drive), plug-n-play identifies the hard drive and generates a BSOD. The exact message is:

***STOP:0x0000000A (0x00000004, 0x000000FF, 0x00000000, 0x804A8ED2)
IRQL_NOT_LESS_OR_EQUAL * ADDRESS 804A8ED2 BASE AT 8040000
DATE STAMP 4344EC59 - NTOSKERNL.EXE

This happens every time.

System BIOS has been updated, OS patches and hotfixes have been applied. USB Drivers have been updated. The only thing in the system event viewer is a message about the system being shut down unexpectedly.

System has 1 gig of RAM and has been stress tested.

I added a Belkin F5U219 pci USB 2.0 card and disabled the on-board USB ports; no change. Went to the Belkin website and installed its latest USB driver; no change. If I use a USB hub, the system stays up until I plug in the hard drive into the hub. The system is fine without the USB drive.

Any ideas and solutions appreciated.

Thanks