NT4 Client cant join W2K domain

Win2K domain, Server running wins, and dns, and has 2 network cards. NT4 clients cant join, find or logon to this domain. can ping server name and dns name, nslookup works okay. Checked and netbios over tcp/ip has not been disabled and server still supports pre win2k clients (it has not been changed to win2k only in AD sites). I think the problem lies in wins as NT4 uses netbios and especially since any XP or Win2k client (uses dns) will work fine. Any help would be great, thanks in advance.