I have to say: my english is bad (i learn it by myself).
Well, i have the free trainer, i open it and then open the game, then i press F1 and the message is: The trainer canot find the game.
I using a phenom I 9850, 4G ram, Video g-force 9600Gt 512 ddr3, and SO seven 64 bits.
what i should to do about?
I cannot finish the game
Well the problem seems to be that you're using the trainer for the demo version. What you need is the other trainers, depending on whether you have the retail or origin version of the game.
You might have to upgrade to unlimited membership to get the trainer for the full version of the game. There were a couple of competitions which offered unlimited, but I don't know if there are any planned in the future.