If you are trying to use this with the Awalened DLC it will freeze on ya. We are all waiting for this trainer to be updated so it will work on the DLC but as of yet, no one has updated it. There are several trainers out there for this game, none of them currently work with the DLC. If it's freezing on the main campaign when you play it, then I'm not sure why, may be you have TU2 installed and not TU1 ??