New player: Need help with a game setting issue

Hello, so I recently downloaded WOTLK from here and have been wanting to play on Frostmourne. Problem is: So everytime I launch the game, I have to personalize my settings over and over again. Like, my setting aren't getting saved. Even on login screen, even after I check the Remember Account Name, every time I launch, I have to re-enter my account name. Having to redo my settings on every log in is really tedious. Is there a way around it, it shouldnt be this way right? Every time I launch the trailer plays again and I have to sign the agreements ands stuff, basically it's like when you launch the game for the first time. Could really use some help. Thanks

There is detailed answer to your problem on this or previous page o this sub-forum, scroll for it
Don't remember solution personaly, just hinting you where to look for it

Thanks very much for such a prompt response. I scrolled through and found the solution, all's good now. Cheers :D