winlogon.exe entry point not found

Hello everyone everytime I log off my workstation and log back in I get this error message “SAS window: winlogon.exe – Entry Point Not Found. The procedure entry point WMIsWorkstationAuthenticated could not be located in the dynamic link library WMSCHAPI.dll”.
My workstation is a WIN2000 Pro running Novell client for windows over a network. Any suggestions? Thanks in advance your help is much appreciated.

Master Lee, Toronto