We have four NW 6 sp5 servers. Symptoms as follows:

*The server in question is not visible in explorer under Novell
Connections, while the other three are;
*If you click the server under Entire Network\Netware Services\Netware
Servers you get prompted for a bindery login, which fails (you can drill
down into the other three servers)
*Under Entire Network\Netware Services\Novell Directory
Services\tree\container the server and its volumes are visible,