VPN can only browse PDC

On several machines (win2k sp2, NT 4.0 sp6a), I dial in via VPN. I can then browse all share folders on the PDC (NT 4.0 sp6a server) but cannot browse any other servers (some are Win2k, some NT 4.0).I have looked at WINS, TCP/IP,”Code Red Damage,” etc. This has occurred suddenly. One day I could browse, the next I couldn’t browse. I can ping all servers successfully. All servers have been rebooted in the last couple of days, no affect or change. Anybody got an idea?