I can't figure out what I am doing wrong. Do I have to be just centered righted? I have tried it with and with out my slate. I know how to get there and all but every time I go to step off it doesn't work. I have plenty of time but I just can't get it. I have read to walk through and I have done it right. Someone help I have been stepping on and off and linking from bubble to elevatore for 1 hr and 45 min.