Talk:Rise of the Fallen/@comment-76.4.78.222-20130424182747/@comment-204.250.119.254-20130424201648

Assuming the key is still in your inventory you must be at the wrong door. The door the 2nd key opens is the one with a bunch of the giant explodey undead guys behind it. There should be an explosive barrel just to your left (if you throw it into the locked door it'll start a chain reaction of exploding fatties on the other side).

If that sounds like where you are then it should let you in.