...funny though as when I click on login my user name and password are already entered, I just have to hit login, again. It doesn't make sense, the site remembers my login details when I go to login but it should know who I am when I first enter rootschat.
I would suspect that it is Firefox that is remembering these details rather than the Rootschat server.
Try looking under Tools, Options, Security, Show Passwords and then Show passwords again. Look for rootschat.com and it should be there.