Ti.Media.createSound-Sound issue

hi

I am using Ti.Media.createSound to play wav format audio file from a URL.

audioPlayer = Ti.Media.createSound({
    url :URL

     preload : true

});

audioPlayer.play();
sound is playing..and i am using    audioPlayer.stop(); to stop the playback,
 but it is not stoping.

Is there any way to stop the playback?

Titanium sdk version :3.2.0

Thank You