Windows xp sp2 w/ novell client 4.91sp2 slow login times


I have noticed really slow logons with machine running Windows xp sp2.
Login times are running 3.5 - 5 minutes. Logon times on Windows 98 and
Windows XP sp1 seem significantly faster. I was wondering if any one
know of this specific problem with Windows xp sp2 logging into a Novell
6.5 server and if they know of a fix.