In order to change your game password you do not go onto your forum profile and account settings, this only changes the forum password.
If you wish to change the ingame password you must log into the yellow box next to the banner, and then click the text "User Details" it lets you change your password for the game.
You should avoid doing passwords resets if you don't know which mail you have or if you are uncertain of what to do in general, because many people have lost their password this way, spamming "forgot password" and gets lots of tokens sent their way in mails and then they don't know how to get it back to use even though the instructions provided in the mail.