we did send out many warnings to people's e-mails that this was coming, and we did this months ago. and we did send out offers to existing cheathappens members. perhaps your e-mail is no longer correct?
it's because the game updated yet again. relic needs to get their act together. (you can check your version number on the trainer with the version number in the options section of the game at main menu)
we already updated the trainer. pwizard will post the new one shortly.