Okay, it's the iPod Classics MusicQuiz2 which doesn't work when I transfered my music with Winamp(ml_iPod). When there should be a song which I should identify, there's nothing (just the theme music of the quiz)
So, I just have the possibility to tic the correct answer without listening to the song (and that's of course impossible^^)
That's the problem...
(I use the newest Winamp version and all ml_iPod Patches)