[Mailman-Users] Upgraded to 2.1.2, old lists work, new do not

[Scott Brown]

The question is mainly in the subject, but I will re-say it.
  The group I am with has a dedicated server that comes with Mailman, 
version 2.0.3. I downloaded 2.1.2 and installed it to the directory that 
2.0.3 was in. Install went fine. When I go to the control panel for the 
pre-2.1.2 lists everything works. However, when I go to the control panel 
for the new lists I made I get page can not be displayed errors and the 
links are all screwed up. Instead of being: mydomain.com/mailman/whatever, 
I get servername.hostingcompany.com/mailman/whatever.

Is there a config file we can change that with?

Scott