Mine does the same thing now. Keeps saying "on / off" over and over in an endless loop when I press F1 on the main menu now. Just started today. Worked fine yesterday and before that. No idea why it would just start doing that out of nowhere like that. Nothing has changed on my PC since I reinstalled the game a week ago or so.
Mine don't work it says activated at the main menu and when i go ingame i press NP1 and it says activated but nothing happens BTW. i bought it on cheatscapes so its no pirate plz help me hear Superior elder!
P.S my empire total war trainer works fine :P but i like napoleon better