hldj.org

Hi i need help with HLDJ.
I had just finished adding some music. and i started HLDJ and clicked "Play" it came up with a pop-up. I click "ok". But i made a big mistake i did not read it and now i cant get CS:S in my game profile. I used game directory but the green light wouldnt light up.
Have any Help?
Please Please

Make sure you have the correct directory, follow the steps here: http://www.hldj.org/manual/getting_started.html
If you're sure you have the right game directory, try verifying the integrity of the files in Steam or re-downloading the game.

The directory right and everything but how do you find the integrity files in steam?