I own the DS version of Ghostbusters: The Video Game, and I am stuck! I completed three out of five story missions. In the Museum one, I do fine until I must get the gates open and take out the curater. Problem is: I take the keys to the secuity room, and one control switch opens and shuts the door to the corridor leading to the elevator, one opens and closes a door I can't see anywhere, and the third doesn't work! I can't take the curater on the elevator and just take him out the door. I am forced to abort the mission. HELP!