Count down timer disappearing

Hi, I have a simple count down timer script I found online which works but my game has 6 parts and each part is using a different movieclip. If I only use 1 movieclip the timer works. When I add the next part (movieclip) it disappears. Any ideas?


var count:Number = 60;
var myTimer:Timer = new Timer(1000,count);
myTimer.addEventListener(TimerEvent.TIMER, countdown);
myTimer.start();
function countdown(event:TimerEvent):void {
myText_txt.text = String((count)-myTimer.currentCount);
}
if(myText_txt.text == "0"){
      gotoAndStop("MovieEnd")
}
 

Thanks

Eddie