I have a Netware 5.1 network in 2 offices which are connected via Cisco

We have enabled client VPN access on the Cisco router. On a Windows XP SP2
laptop, I installed Cisco VPN client 4.7 with Novell Client v4.91 SP1. I
specified 2 directory Agent list by their IP addresses on the Novell client
properties. I have not problem login when I am directly connected via the
LAN connection. However, when I am out of the office, I would use any
Internet connection and VPN into the remote office router by runing the
Cisco VPN client. I can login to the network but when I try to access the
network resources, it would say "\\TREENAME\.SERVERNAME_VOLUMENAME.CONTEXT
is not accessible. You might not have permission to use this network
resource. Contact the administrator of this server to find out if you have
access permissions.

The specified path is invalid.

However, I can open the folder with the same login ID if I login from the LAN.

Can anyone points me to the right direction.