[Mailman-Users] new list members not subscribed

[sbt]

Hi all,

I have had a mailman list for a couple of months.  When I first started 
it, new members subscribed without any problems.  Now when a new 
members subscribes, although my MTA logs show appropriate mail going 
back and forth, the new members do not appear on the subscriber list 
page and do not receive the list mail.

Any ideas?  I apologize in advance if this is a rank newbie question, 
but I don't see it in the documentation.

Streph