[Mailman-Users] MM 2.1.3 digests keep failing to go out

[Mark]

I have three active Mailman 2.1.3 mailing lists
at my email-hosting provider, http://www.ricochehost.com
The Mailman is on their servers as part of
cPanel, a webhosting control panel interface
( http://www.cpanel.net ).

Every few weeks, the digests simply stop going
out, and the admin there fixes this by reinstalling
Mailman each time.  But I won't have him keep
doing that.  I have been sending the digests
manually as a stopgap, but doing so is tedious.

Does any of you have any idea what might be
causing Mailman to stop sending digests, and
how it might fixed?

Thanks in advance.

Mark in Berkeley