I've been experiencing an intermittent problem in which my laptop loses
its connection to the Netware server. I'm running the Netware Client
v4.91 and I'm connecting to a Netware 6.5 SP4 server. The workstation
is running Windows XP Pro SP2, with the firewall disabled, but I'm
running Symantec Client Security v3.0.2, which contains Symantec
AntiVirus 10 and the Symantec Client Firewall. There is no wireless
network device, and my BroadCom Gigbit NIC is configured to 100mbps with
full duplex.

When I log in, my laptop authenticates to the primary server and maps
drives. Then my login script uses the TREE command to connect to two
servers on different trees across our WAN. Usually I can work for two
or three hours, but at some point during the day, none of the mapped
drives to my primary server will work.

If I try to access the data via the Network Connections, I receive a
message stating, "<UNC_Server_Name is not accessible. You might not
have permission to use this network resource. Contact the
administrator....." Interestingly enough, I am able to access other
servers in my tree, and I'm able to access other trees. The problem
persists if I try to log into the tree again, and it is only resolved by
rebooting my workstation and starting over.

If anyone has a suggestion on how to fix this problem, I would
appreciate it. My laptop is the only computer out of 30 other XP
machines that is experiencing this problem.