I have just bought and started playing crysis 2. After a short while, in the game narrative, you obtain alien DNA and the game asks you to press the back button to open an interface to upgrade your 'nano-suit'. Pressing back does not work and the player-character is routed to the spot. My controller is not broken - I have tried 2 different controllers and also tried the back button on another game, they work fine. I have tried reloading from a checkpoint but the same thing keeps happening. Obviously, this means I cannot progress any further in to the game. What on earth is going on and when will it be fixed? As it stands I may just have thrown ￡40 in the dustbin!