In Glitzville I have defeated Rawk Hawk and am in the Champ's dressing room but someone has stolen the Chrystal Star (I suspect Jolene). I am told by the wizard under Rogueport (for a hefty price) tells me to ride Yashi to the AC vent then destroy any obstacles with the Super Hammer. My problem, and thus question, is that I can't get Yashi to carry me to the vent. She won't go up and down, only forward and badkward and when I climb the boxes which make me level with the vent she only makes it half way before falling to the floor. Over andover. What am I doing wrong?