I am not sure, but I think I am in EU section but here is what happens and may cause the trouble :
I was using Chrome and Firefox
My email adress is from my region www.seznam.cz
I created the account because I wanted to register my FFXIII http://www.square-enix.com/eu/en/
I have Norton 360 installed
After I correctly write nick and password and click on login, it just refreshes without saying anything like password wrong or nick wrong and all fields stay exactly as they were (I still have filled my nick and password) simply everything is exactly same.
Once the game is over, the king and the pawn go back in the same box.