i'm getting the exact same problem, i had it work once last night i enabled it as i was entering a game offline.. but now i cant do it again.
Edit: i first had this problem downlaoding on chrome as now chrome thinks cheat happens trainers are malicous as they have never done that before, i downloaded with firefox and seem to have no issues now.
i have the same prob. but if u look at the trainer it says ver. 22.214.171.12411, but the game is a later version. maybe its just a routing/link problem that give us a earlier trainer. So its not the new trainer. thats my guess.