Problem with Blueprint Made Music Player

Hello Folks,

I’ve created a Simple MusicPlayer for my Game. The Player can choose a random Track by it self that is different from the last played Track.

My problem now is that the actual Audio Component (MusicPlayer) does not play any Music. The Blueprint it self should work becaus it outputs me the duration of the playing Track properly.
I have created the script in the EventGraph and not Construction Graph is there a problem? Any Ideas? Any Solution is welcome!

EventGraph

PlaySong Function (I think this Funktion is broken…)

greets Kiliangg