Problem with Mailman


I have a customer that would like to use Mailman. All is good and mailman is working. The problem I am having is that I cant seem to figure out what I am doing wrong with the management of Mailman.
I would like to allow the customer to create and manage their Mailman accounts and lists from Virtualmin, but when the customer login to virtualmin and chooses and then services there is no link for mailman, I have enabled the feature for the domain.