When you download the game, you're skipping the Adfly advertisement in the top right-hand corner, yes?
Sometimes you will have to log into the little space over the Home, Help, Search, Profile, etc., to have access to the forum, whereas, you will need to log into the golden box to manage your character details in the User Panel, and whatnot. My suggestion would be to log out, clear your cookies, restart your internet browser, and try logging in again.
If your issue had to do with in-game signing in, let me know.