It's probably due to the fact that right after the second trainer was posted Steam shoved out another 35MB patch.
Could be, but the first one didn't work either (from day one).
We don't know why the trainer doesn't work for *SOME* people, but we are looking into it. ****ing and moaning about it over and over will NOT motivate us to look into it further.
What do you need from us that doesn't work?