I'm not sure anyone has tested it on Steam versions, so it may not be compatible. Has anyone else had any luck with Steam version?
One thing you can try it using the no-cd fix for v2.101 on your steam version and it may make it compatible.
Trainer work perfectly fine under steam
launch the trainer, launch steam, launch the game, press F1 at the main menu (try several times if needed) then launch the campagne and press options