Cannot find the logon server

I tried to map a network drive thru a VPN connection to a
remote WINNT server at a WIn98 workstation. The Win98
workstation is in a peer to peer envirnoment. When I
tried to map a drive letter to a WinNT shared resources, I
get an error message: Cannot find logon server. It seemed
that thw Win98 can detect the share resources on the WinNT
server, however, the shared recsource required a local
name and password since it was a server and somehow the
Win98 client cannot get response from the logon server of
the WINNT server. Is there anyone can I me to map the
WinNT resource to the WiN98 workstation.