Problem obtaining AFS tokens in Windows XP

Hi,

I have a problem with OpenAFS on my laptop. I'm running Windows XP SP 2
(Tablet Edition) with OpenAFS Client 1.4.0008. I was having problems and
tried to fix them, and eventually gave up and reinstalled Windows, but
I'm still having the problem. At one time, OpenAFS worked on my laptop.
Now, it works when I'm at work, but not when I'm at home. However, my 
desktop at home (on the same network) works just fine.

My AFS Client does not appear to be able to contact the cell to get my
tokens. I'm also using Kerberos so my machine can get Kerberos tickets,
but hangs for about a minute while it is doing so (presumably because it
tries to get AFS tokens and eventually gives up). I've run the following
command using the command shell:

C:\Documents and Settings\cadlerun>aklog -d -c csail.mit.edu
aklog: Can't get information about cell csail.mit.edu.

Any help in debugging this would be greatly appreciated.

Many thanks,
Aaron Adler