I had the same issue, thought I was given the wrong keys. Took me over an hour to unlock it. Basically, I had to remove the two security screws, pull the entire speaker panel out (be careful, wires are still attached), remove the screw holding the locking mechanism on and then reinstalled it. Loosening the security screws should ultimately allow the key to turn. I couldn't understand exactly what was wrong, but reinstalling the lock fixed the issue. I alerted JJP to the issue, seems I'm not the only one. No foam on my game.