External USB Disk not detected - windows server 2003

[infinet]

server : HP ML370 G3 with Dual processors

I have issue with Windows Server 2003 Ent with SP2, when try connect usb
hdd. It is not detected.

After applying w2k3 service pack 2 I noticed that the USB drive was not
always being detected. I was advised to apply the hotfix KB931317 (Windows
Server 2003 - KB931317 -x86-ENU.exe) but this has not solved the problem.

I first noticed problems with the usb disk being detected while still on
SP1. And thought SP2 would cure the problem.

The hard drive is a toshiba MK4025GAS sold as a branded mobile hard disk
called "flight case".
- The usb HHD works fine on my w2k3 SP1 machine and on my XP SP2 machine
- I have updated to the latest bios
- I have updated the Proliant Suppport P**** (PSP) software to the latest
available.
- I have apllied all the MS security updates available.
- There are no disks with unassigned dirve letters. So rescaned for disks
but this
did not help.
- There are no usb devices under Device Manager either. Its as if the
server does not recognise that a usb device is attached.

Any ideas how to solve the problem.