loadSound

Hi,
I want to load an mp3 externally, make it stream, but I don’t wanna play it right away. The mp3 loads fine, but offline I can hear the first second playing, and when I put it online it starts playing all the way after a bit has been loaded

coolTune = new Sound (soundLoader);
coolTune.onLoad = function (success:Boolean) {
 if (success) {
  coolTune.stop ();
 }
};
coolTune.loadSound ("music.mp3", true);
mcPlay.onPress = function () {
 coolTune.setVolume (60);
 coolTune.start ();
};

I tried several codes, with setVolume too, but how can I load it, not hear it , and only hear it when I click the playbutton?
thanks,
Jerryj.