I had a smililar problem with one here.
The real problem was that it continued to come back and found that the registry entries for one or more of the printers was scewed up.
I was only able to fix it by rebooting, removing the pritners, deleting all of the registry entries and re-installing each of the printers.
The registry entries are found at
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Printers]
Hope this helps
Good Luck!
Chris