Got the Ap and CW from steam, but wont start.

[ssdg]

Long story short:

I bought the game AP and CW together from the steam. when I try to play it(either one), the preparing to launch screen comes up for both AP and CW, afterward my screen blinks for a couple times and the game wont start(I dont recieve any error message).

I did check for solutions online, manually change the resolution setting, change the compatibility to windows vista SP3(Im running win 7 64bit, not sure if its the right thing to do). I also verified the integrity of the file a couple time from the steam menu.

Please help.