The most likely problem would be that your browser is blocking cookies. The forum software attempts to set a cookie on your system that contains tha password information. If it can't do so, or if you've cleared the cookies since your last session, then you have to log in again.
I figure the cookies set in my browser didn't make the translation. I fixed my bookmark (which used to go to http://northeastshooters.com) and have been much happier since.