I had to do the same thing... until I allowed "Cookies" in my Internet Browser. (Did a full reinstall for other reasons, but I think the cookie-issue did it..) The board leaves a cokkie that contains various information (Skin, language, username, password, last moves et cetera.), and if it's found, then you should not have to log-in every time. I cannot find the "Time To Live" though... I'm online a few times every day, so I donno.
Yours Sincerely, Robert Holsting, Denmark
1/81 SSBN Ohio Class scratch builder, more at www.robse.dk
"Never be afraid to try something new; remember that it was amateurs who build Noah's Ark, and professionals who build the Titanic"