Server doesn't display in Ntwk neighbrhd

server has a fixed ip, right? sounds like a wins problem. check all your stuff relating to wins, make sure it's set up right. make sure the server is registered in the wins db (assume you're using wins). you didn't say if it's going across a subnet or not, or if there is more than one wins server, all stuff to look at. we had a similar problem where machines in one subnet were not appearing in network neighborhood of any machines in another. it all boiled back to improper configuration of wins, and the dhcp integration to wins. in your case, there is definitely something weird with it, because it's dropping the registration after 90 minutes. ck wins mgr, verify the entries, have it scavenge the database, basically do some maintenance, verify all the settings, check dhcp mgr and make sure the wins settings are correct, ck netwk properties and make sure wins settings are correct, etc.