@Dugu
Just log in into the us.battle.net account management. Go to your WoW settings and activate the starter edition of WoW. If it says EU change your link to:
https://us.battle.net/account/manage...n=US&type=WOWT
It ask you for a specific region then. Just pick Americas&Oceania.
I did it yesterday evening. Worked as it should (
http://us.battle.net/wow/en/forum/topic/13841064552).