Slow Spooling

I have an NT SP6a Print server, it hosts several printers and does some file sharing, the problem is that when any users try to print via this server, print spooling is painfully slow, i.e, a user tries to print an uncomplicated 1 page doc, I am then able to look at the que on the client and watch the spool process go very slowly, the byte count goes up in small increments and printing may take 5 mins for one page.

This affects all clients on this print server, other print servers are fine, also the spool file is on the System partition in default directory, but the partition has lots of space 8 gig, so I am confused, any advice?