Trigger activation.

Looking for some help with this game using the Xbox 360 with the wireless controller. My controller works fine in all the games I've played except for this one (The new Tomb Raider) I can not get past the first confrontation. None of my buttons seem to supply the needed kick to escape from the grasp from the guy that likes to hammer his Ice Pick into Lora's chest during the opening introduction. It seems as if the Trigger(s) are not assigned any function. I've seen other people reporting the same but not any suggestions for the Xbox 360 with the wireless Xbox controller, including the tech support from Square Enix... Please, This is not a PC question. I've tried replacing the batteries in the controller. I've tried restarting, & rebooting. Tried changing the game options, axis & aiming sensitivities. Tried all three levels of the game levels and still need help. TIA!!! Steve