I have tried with the legit version and the cracked version. My first time playing the game was on a legit version (my friends) and he used the trainer but I liked the game so much that after I got home I dled the cracked version and the trainer. I have no problems working the trainer now but I did at first. However I called my friend and he told me to do the following
1. Make sure you run the trainer and the game as administrator (by right clicking).
2. Make sure your antivirus didnt block it.
3. Make sure windows is not running it in compatibility mode for windows xp.
My problem had been that I was not running the game as administrator (I did run the trainer as administrator but not the game and you need to do both). I already knew enough to put it on my antivirus ignore list because its common knowledge and I use trainers allot but there are others that might not know that. As for the windows xp thing I guess some people who had problems with the steam in game overlay used that as a fix so they could use shift + tab shortcut to talk to friends but I was using a steam account I had just made (to prevent my real account from being banned) and I have no friends on it. Plus I always hated the shift tab overlay because while playing counter strike I often hold shift to walk and press tab when trying to press q (I have q blinded to voice so I can talk to my team quickly without having to type). So after dying from the shift + tab shortcut a few times I decided to disable it altogether (if I want to talk to a friend on steam I can alt + tab out of game for a sec). Anyway I use windows 7 x64 ultimate on my pc with the cracked game and my friends pc that has legit game uses windows 7 home premium 64 bit.