Can’t get code snippet PlayPause sound on click to work

This is my code:

/* Click to Play/Stop Sound

Clicking on the symbol instance plays the specified sound.

Clicking on the symbol instance a second time stops the sound.

Instructions:

1. Replace "http://www.helpexamples.com/flash/sound/song1.mp3" below with the desired URL address of your sound file. Keep the quotation marks ("").

*/

man1_btn.addEventListener(MouseEvent.CLICK, fl_ClickToPlayStopSound);

var fl_SC:SoundChannel;

//This variable keeps track of whether you want to play or stop the sound

var fl_ToPlay:Boolean = true;

function fl_ClickToPlayStopSound(evt:MouseEvent):void

{

if(fl_ToPlay)

{

var s:Sound = new Sound(new URLRequest("http://Vanillathunder/interviews/dad--whitecollar.mp3"));

fl_SC = s.play();

}

else

{

fl_SC.stop();

}

fl_ToPlay = !fl_ToPlay;

}