Did it work before and suddenly stop?
Can you run the login script from your PC with a local copy of Kix?
How many DCs on the network?
Have you tried replacing the copy/copies of Kix? If you have more than one DC, delete Kix32 from one server, wait for replication to remove the others, then put a fresh copy on one server.

Glenn
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Actually I am a Rocket Scientist! \:D