[Koha] Intranet won't remember credentials

Koha = v2.2.8 OS = Windows XP Browser = Firefox 2.0.0.3 Problem: Just installed Koha on Windows XP. Each time I click a link on the Intranet GUI I have to re-enter my Intranet credentials to access the underlying page. Believing the problem related to Cookies I made sure Cookies were allowed. Any help fixing this problem would be GREATLY appreciated.