NT Server Browser

Can anyone direct me to a site where I can read about Browser’s operation, please? I have a multihomed NT server (sp6) with two subnets, say ..168.21.0 and ..26.0. The third nic communicates with my provider. Computers on different subnets can’t seeeach other until I search for them. I believe the snag hides somewhere in browser operation… I thought it was WinGate that caused problems, but nah… no DHCP, WINS, one of the subnets has IPX installed as well. Hm, with IPX only there was no problem. %)