Can’t load Monitor

Hello,

Hoping someone can help.

Whenever I try loading monitor from the console, I get the following error message on a NW6 Sp2 server.

Loading module MONITOR.NLM
NetWare Console Monitor
Version 12.01f 6 February 2003
Copyright 1989-1998, 2002 Novell, Inc. All rights reserved.
SERVER-5.60-918: Loader cannot find public symbol:
GetNumberOfMPServerProcesses
for module MONITOR.NLM
Error processing External Records.
Module MONITOR.NLM NOT loaded
Module MONITOR.NLM load status UNRESOLVED

Any ideas?