Please, help!

So i just received my hearthstone key today, i did everything: installed the beta app thing, redeemed my key, installed hearthstone. Now, when i log in to the beta app thing, select hearthstone and press play, the play button greys out and says "launching" for just a brief second then says "playing now" (while nothing else is happening), and then the button turns back blue and says "play" on it. It's a dead circle... I have no idea what to do.. I've searched far and wide in the deep crevices of the internet but haven't found the answer, so i look to you, brave Dayknights, for assistance.

Much appreciated.