Go to the main website. Log in there, and check the box between the password and the "GO" button, then hit "GO".
That box is the "Remember Me" option, just unlabeled (at least, it's unlabeled in my browser.
If you're already logged in, log out and back in, checking the box.
While this persists for me just fine at home, I have to redo it about once a week at work.
Yeah I have no problem on the main page, details in already and I just click ok. If I go direct to a page though it's different, I am fine with that. If you have problems on the main page it is probably your browser settings.