This is only my second game so as simple and explicit instructions as possible would be appreciated. I am in the start of chapter two of part IV: A New Hope. I cross the bolder after blowing up the debris and making a bridge crossing. Obi Wan and Luke kill the enemies, use the force to destroy all of the objects. Obi Wan faces a red large door which I read can only be opened by using the dark force which he does not possess. There is a leaping off point from which Luke can use the blaster to grapple up onto a ledge from which it seems he is unable to do anything. My understanding is that Luke and Obi Wan must reach the top of the wall using a combination of grappling and the force--since I am unable to move the platform from which Luke grapples and the dark force with Obi Wan how do I accomplish getting to the top of the gate and opening it.