Yes it does not say anything when you press 1 or 2 but it still works.
If you have a career with a team you need to use the 2 button the 1 button I personally never use.
If you have heard the F1 voice: "Trainer Activated" then it will work.
You can put your effort to 99 and the riders will never tire (The yellow and red bar is locked). It does not work in Time Trials but that is not that important.
Try setting all your riders to relay at 99 and when they are all at the head of the peleton you press the attack. Then your entire team will break away and never get caught.
You can use Art Money to cheat with the money. For this to work you need to have the game run in a windowed state because if not the game will always force its way to be the front screen.
To all that can't get it to work you are using the wrong version of the game with the wrong version of the trainer.
well considering i brought it straight from the official website i dont see what other version there could be.