That's the trainer for ODST, are you playing ODST?
Every game has it's own trainer so read the name of each trainer on the list before downloading. You need to get the right one for the right game. To see entire list scroll down to the big red bar that say CLICK TO SHOW MORE TRAINERS.
ah ok ill try that... i just thought downloading the newest trainer for the game called master chief collection would do the trick... and that it then would work with all the games within...
then why not just make a trainer for each game individually and post them as the games name ex. Halo Reach, halo 2 etc....?? im not that technically i just go look for a trainer for the name of the game i have.. so when i have the game master chief collection i go look for a trainer for that game, hence i found one and thought ok.. this is the latest trainer for THAT game.