Logons

I have novell on my windows xp laptop and when i start it
up, it up, it goes to the novell logon window, but every
time i log on, i get a message that says that a specific
controlled for the specified domain can not be found, so
i always have to click advanced and domain and the name
of my computer, not the default domain that i can't log
into. My question is how to delete the domain that i
don't need.