mailman not working

A client is complaining that Mailman lists are apparently not working. I logged into the server and here is the output from /var/log/mailman/error:

Feb 18 04:02:53 2007 mailmanctl(32077): PID unreadable in: /var/run/mailman/master-qrunner.pid
Feb 18 04:02:53 2007 mailmanctl(32077): [Errno 2] No such file or directory: '/var/run/mailman/master-qrunner.pid'
Feb 18 04:02:53 2007 mailmanctl(32077): Is qrunner even running?

I tried to start mailman from /etc/init.d/mailman but got this message:

Starting mailman: Site list is missing: mailman [FAILED]

Do I need to enable this function somewhere or start some other related service?

Status: 
Closed (fixed)