Bayes works with SA but not MailScanner

[Martin Strand]

I get Bayes hits when I run a message through SA with "spamassassin -t <  
message" but I don't get any hits when the message is passed through  
MailScanner.
Bayes is enabled in spam.assassin.prefs.conf and all db files are owned by  
the postfix user (I assume that's correct)
I don't even know where to look, maillog tells me nothing... help?

Thanks,
Martin