I also borrowed my friend's just dance 2 a few days before and that didn't work either so I know it has something to do with my wii. I've tested all my other games and they work fine. But when I put in the Just Dance 2 game in it will show it on the menu but as soon as I push start an error screen comes up and says 'an error has occurred while accessing wii memory please refer to your wii manuel', I did that and all my wii manuel says to do is unplug the counsel (which i did) and replug it in. Oh and also once the error screen comes on it won't let me turn off the power or reset button so I have to manually unplug it...any ideas?