wins2x pc can’t link to wins9x pc’s

I manage a small 35 pc wins 2000 server-LAN running wins2xpro on 33pc’s and 2 pc’s with wins9x. all computers can see each other except one with w2x. it does not register in the directory and do not respond to DHCP. virtually,it does not exist. however pinging shows that it is there. manual setting of tcp/ip enables it to see and access all the pcs, and even the internet but can not access anything on the 2 wins9x pcs. changing net-cards not help. what to do?