Lost network connectivity

Running W2K SP3, on Netware 5 network, IP connection. When connected to Internet I lose all connections to the network. NIC Intel Pro/100S running ar 100Mbps full duplex. W2K fully patched
Netware Client is latest for W2K/XP
problem started sometime after SP3 install and another program (Freedom software)that accesses networked Dictaphone recorders that have static IP addresses. Network running DHCP / IP addressing 10.10.0.x – 255.255.0.0
Maybe this is TMI but this has stumped me for weeks.Netware server is fully patched. Everyone I ask about this is as stymed as I am. Doesn’t matter if I’m logged in as Admin or Admin equivilent.