I've just started Prince of Persia for GC, and am having MAJOR problems wall jumping up the statue. I can launch myself once, occasionally twice, but I just cannot ping pong myself up the statue. I've tried hitting "A" quickly, and I've tried waiting until I'm well landed. I've also tried a wire controller and a wavebird, to no effect. What am I doing wrong? I am using the control stick to push to opposing walls.