I'm using a Win XP with Client 4.91 sp4.
The problem has begun few days ago.

When trying to login the ADVANCED > TREE don't find\show any tree and of course I can't login.

If I choose\check "Workstation Only", after loging to the workstation > opening the Netware Client from the task bar ...it show the tree and permit me to login to the tree.

How can I fix the problem?