Just upgraded my NW6.5 from SP3 to SP4 and now users can not login at
all, they receive a 'The system can not log you into the network' error.

Sometimes they are able to sometimes not, sometimes works after rebooting
the workstation but when they log off the following person can no longer
log on. No errors listed anywhere, no visible signs of problems.

The only workstation that logs on everytime is my own which has a static
IP, the DHCP/DNS server is also my file server (Netware 6.5 SP4).

Any ideas ?