mailman problem

hi, when i try to start mailman using "rcmailman start" i get the following error: Starting mailmanSite list is missing: mailman failed does anybody have any ideas what the problem could be? thanks --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.481 / Virus Database: 277 - Release Date: 5/13/2003