By following the instructions perfectly you include running trainer with admin rights, whitelisted the trainer and/ or the files written in Windows TMP folder in your AV or disabled all security software running?
Cheat Happens trainers are made for Singleplayer and offline use only.
It's in your own interest to never use a trainer in an online environment even though the trainer might work.
From the Cheat Happens FAQ:
Q: Why aren't there any cheats for multiplayer games or modes on your site?
A: CHEAT HAPPENS does not support or condone the use of cheats in a multiplayer environment.
[Edited by moderator Taurusplopp, 1/26/2017 5:38:11 AM]