Cannot sync, error message "could not be read" for an iPod no longer in use

I have two problems. I upgraded iTunes to 7.2 and the very next morning my iPod died. It is completely unresponsive. Maybe it's coincidental. So I bought a new 80 gig iPod and gave it a different name than the old dead iPod. Now when I try to sync the new iPod, it goes for about 10 minutes, then it fails with this message:
Attempting to copy to the disk "old iPod name" failed. The disk could not be read from or written to.
It is complaining that it can not read the old dead iPod that is NOT hooked up to the computer! Somehow, minutes into syncing, iTunes has forgotten which iPod it is looking at. I have seen the article about the "cannont be read" message and it is not relevant. I need to make iTunes forget about the old dead iPod so it will stop looking for it. I've tried removing the files from "Documents and Settings" but iTunes still remembers the old unit. Where else does it store information? Any recommendations?
  Windows XP
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Attempting to copy to the disk "old iPod name" failed. The disk could not be read from or written to.
It is complaining that it can not read the old dead iPod that is NOT hooked up to the computer!
Okay, that can sometimes be caused by a Windows drive letter confusion. For troubleshooting advice on that possibility, see the following document:
Windows confuses iPod with network drive or hard drive and may keep iPod from mounting or songs may seem to disappear