I've tried this app over and over (with both 2.1 and 2.2) and I just can't get it work... Once I download it, it tells me to start a song in music, then restart pockettouch. I do that, but I just get a black screen. When i swipe left right up or down nothing happens. Do I start pockettouch while music is playing? or pause the music then start it? Has anyone else tried it?