[Spambayes] 500 Server error when training

[Dale Schroeder]

SpamBayes 1.1a3 running sb_server.py on Windows XP 32-bit.  SpamBayes 
has been running on the system for at least 2 years.
Now, attempting to train results in the following:

Training...

500 Server error

Traceback (most recent call last):

File "spambayes\Dibbler.pyc", line 476, in found_terminator
File "spambayes\ProxyUI.pyc", line 299, in onReview
File "spambayes\Corpus.pyc", line 186, in takeMessage
File "spambayes\FileCorpus.pyc", line 210, in load
File "gzip.pyc", line 49, in open
File "gzip.pyc", line 95, in_init_

IOError:  [Errno 13]  Permission denied: 'C:\\Documents and 
Settings\\<user>\\Application 
Data\\SpamBayes\\Proxy\\pop3proxy-unknown-cache\\1316143395-2'

Can anyone decipher this?

Thanks,
Dale