Cannot connect to Terminal Services after updating client to XP Service Pack 2

One of our employees frequently works from his home desktop using Terminal Services on our Windows 2k server. He recently updated Windows XP to SP2 on his machine and now gets the following error when he tries to use WTS.

"The remote computer disconnected the session because of an error in the licensing protocol"

I assume in his upgrade he has lost the license that was registered on that machine, and for some reason Terminal Services is not re-issuing him one. Any suggestions on what I can do about this?

Thanks,
Benjamin
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benbeckerAsked:
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benbeckerAuthor Commented:
Thanks, I found that page in my google searching, but did not have any success with its suggestions. The most relevent suggestion was deleting the MSLicensing registry keys from the client, but even that did not work in this case.  There are plenty of other users connecting and using WTS every day, so it is something isolated to this client machine.

I found this post as the accepted response to this exact problem on another forum, but there was no followup and I do not know how to act on this suggestion....

"Remember, once you connect with a computer, it pulls one of your CALs
(at least after the grace period). Since you are using XP Home w/
Win2K TS, you are not "comp'ed" a CAL (only Pro machines are comped a
TSCAL with Win2K TS)"
   (from http://www.mcse.ms/archive67-2005-2-1425552.html)

perhaps this gives someone else a clue on what I should try?
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