Unable to launch the game

[gamegod124]

I just bought the prison architech pack that includes all other packs and several other games. when i tried to first play the product key window steam displays would pop up, and once i copied it and pressed play, it would take me back to the key window, it did this several times. I decided to press the "dont show again" button and now when i try to play the game it shows the "preparing to launch prison architech" window, it will go away like the game is about to open, and then pops up again. I even used my key to register on the forums and went ahead and submmited a name while i wait, id really like some help with this matter, ive wanted this game for a very long time and i got it while on sale, thanks

Phalean.