LocalConnection between main SWF and other SWF doesn't work!

Hello, can somebody help me!!

I have one main SWF within several  SWF's. I want add the score from every level to the main SWF.

But I have also a code to unload every SWF before another SWF starts. I figured out how to do that.

But I don't know.

The code I have is something like this:

The level.SWF

stop();

var sending_score:LocalConnection = new LocalConnection()

    sending_score.send('_myConnection','add_score');

var App_Timer1:Timer = new Timer(100,1); //After 3 Seconds the timer causes the movie to jump to the next frame

App_Timer1.addEventListener(TimerEvent.TIMER_COMPLETE, startApp1);

App_Timer1.start();

function startApp1(event:TimerEvent):void {

   gotoAndPlay(105);

}