We are in the big room on the Death Star with the large window. We have Leia and are trying to bring the ramp out of the wall so that we can dress as stormtroopers to get inside the next room. There are red buttons on the floor and some kind of hover vehicle that we pushed off the ledge above us. I figure that I need to light up all the red buttons, but how do I accomplish this task? I can't seem to get them to all turn green at one time. Am I missing something - we are very frustrated!