Computers can't see my ipod

Question

I've plugged my ipod into multiple computers, with both its firewire and a usb cable. The ipod always says 'do not disconnect' but never shows up on screen or in itunes.
On one machine with multiple users I got a 'this ipod is in use by another user' and on one (the last one it worked on) I saw 'this device is a format that macintosh does not understand'.
I have performed the restore function and tried to get it into disk mode to reformat, but neither works.
Other than not being recognized by any computer, it works fine, charges in the stand, plays music, etc. But I have to be able to mount it, so wonder how to get it workin again.

Answer 1

Nope, thanks though. I tried removing the .kext file without success. Also ran ipod updater, but the computer doesn't see the ipod. However, both system profiler and disk utility see it.
When I ran verify in disk utility I get the following:
Verifying volume $B!H(Be-Learning Services iPod$B!I(B
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Keys out of order
The volume e-Learning Services iPod needs to be repaired.
Volume check failed.
Error: The underlying task reported failure on exit (-9972)
1 volume checked
     0 HFS volumes verified
     1 volume failed verification
I ran repair disk and get this:
Repairing disk for $B!H(Be-Learning Services iPod$B!I(B
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Keys out of order
Rebuilding Catalog B-tree.
The volume e-Learning Services iPod could not be repaired.
Error: The underlying task reported failure on exit (-9972)
Repair attempted on 1 volume
     0 HFS volumes repaired
     1 volume could not be repaired
So does it have to go back to Apple now?