Multiple logins

I am betting this has come up in the past.

So I now have my DNS set properly, I can use the DNS entry to get to RT.
I then login, but then anytime I change menu location I am forced to
login again.

The ServerName in my VirtualHost matches the DNS entry and the URL I am
I have UseCanonicalName set to off

I am betting it is something I forgot to change in that
acts like a base name for links. Suggestions …