bayes_journal - Bad permissions

[Martin]

Hi,

I keep getting permission errors when learning messages through Mailwatch:

SA_Learn: bayes: bad permissions on journal, can't read: 
/var/spool/MailScanner/spamassassin/bayes_journal

This is my permissions of /var/spool/MailScanner/spamassassin/:

drwxrws--- 2 postfix www-data   12288 2006-11-28 14:57 .
drwxr-xr-x 6 postfix postfix     4096 2006-04-24 17:07 ..
-rw-rwS--- 1 postfix www-data 1331200 2006-11-28 14:57 auto-whitelist
-rw------- 1 postfix www-data   10632 2006-11-28 14:57 bayes_journal
-rw-rwS--- 1 postfix www-data      36 2006-11-28 14:55 bayes.mutex
-rw-rwS--- 1 postfix www-data 1318912 2006-11-28 14:53 bayes_seen
-rw-rwS--- 1 postfix www-data 5160960 2006-11-28 14:55 bayes_toks

Even if i change the permissions of bayes_journal. It keeps resetting 
the permissions.

Any clues?

Thank you