So I got all 3 abilities then defrosted the keycard and got in the basement, felt like I was about to go to Act FINALE. Until I ran into a problem, for SOME REASON it won't let me use my crouch invisibility ability. So I am just crouching as the shadow man walks by, and just restarts me back. I CAN'T PROGRESS! IT WON'T LET ME USE MY ABILITY, Help!!!