Windows 2000 print server

We have a print server running Windows 2000 Server O/S. The problem is that there are some errors that have appeared that don’t give much information. I was wondering if anyone could give more information on these errors:

The server service wasunable to map error code 1722.

The server service was unable to map error code 1726.

The Print Spooler service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 600000 milliseconds: Restart the service.

Thanks