Check if you have version 5.5.8 dated June 04, 2003 on your machine. This version is required to start NMAS 2.2. If your server does not have the minimum required version of this NLM, copy the netnlm32.nlm from the directory NETNLM32 on the Companion CD to sys:\system directory of your server.
The latest version of the NLM can be downloaded from support.novell.com. Download and extract nwlib5.exe on the server. The DSAPI directory will be available in the extract. Copy netnlm32.nlm from the DSAPI directory to the sys:\system directory.