logging into Win2k Professional

From my Win 2k Prof, i login to novell server using client for novell netware. at the same time i login to my local system too with a same user name.

Now i have a user who doesn’t have login ID to novell server, but he has user access to this local machine. now how do i cancel logging into novell server & just login to local machine.

the moment my system boots up, it presents a novell client login screen, if i cancel that login it closes the login screen. but never allows u to login to local machine. unless u have login account in novell server, u can’t log into local machine.

how do i slove this problem ??