apple mail service

Hi, I've been using AMS and its been working fine and was looking at the article here to see how I could enhance our system , however now (after an apple security update) have a problem - I can no longer access any users mail - I get IMAP log entries like : Sep 12 2003 17:20:38 IMAP User "another" attempted to log on from 111.111.111.111 but failed. User has an account on genomics.ourdomain.com. Sep 12 2003 17:20:39 IMAP User "another" logged off. the password server log shows no entries relating to mail service- should it? Paddy