EMSRV no longer supports NetWare 4.11 or NetWare 5.0, but EMSRV can be run on those platforms if additional steps are taken. CLIBAUX.NLM must be loaded before the EMSRV NLM is loaded. CLIBAUX.NLM is included with Novell's NetWare 4.11/4.2 Support Pack 8a, but is also available separately from Novell in the file CLIBAUX1.EXE, which can be found at the following location:
http://support.novell.com/cgi-bin/search/download?/pub/updates/nw/nw42/clibaux1.exe