Studdering sound

Im using MediaPlayback-component to load MP3-files into and play them.

I use this code to call it:

myMediaPlay.setMedia(“SOUND.mp3”, “MP3”);
myMediaPlay.play(0);

Problem is that the sound is played twice overlapping eachother (some of the mp3 is played first, interrupted, and then restarted again to finish fully).

Any ideas?