Class instance not running. Works as AIR 3.2 but not as AIR 3.7?

Hi there. I’ve got a massive problem. I’ve made a game for iOS using Flash and now it is finished and it works perfectly if I publish it with AIR 3.2. But if I publish it in AIR 3.7 then it works in the debugger screen within flash but in my iPhone 3gs apparently the game instance isn’t called. ‘Credits’, ‘Levels’ and ‘Help’ sections do work.

It is made with a main class (marbleGame.as) which imports a second class (initGame.as) which is an instance of the game. I’m terribly puzzled and don’t know what to do. Any ideas why this could happen? Thanks in advance to all of you.