strange problem with a line of code (project Hang )

hi

i have AS3 mp3 player , in a specific Frame i need to pause sound and when i exit this frame the sound play again

the paues-play is put on 1 movieclip with instance name controller

the frame one in controller is show pause icon and frame 2 is play

i put these functions to my button that must sound paused :

anyway i put the event Event.REMOVED_FROM_STAGE and put these funcions in the frame that i want to sound play again after exit frame :

These code works well in Flash but my Problem is On Swfkit ( third party Tools to create Desktop Application ) , the exe application made by swfkit run without error , but when i want to Exit From frame (that sound Pause and play on exit) the Application Not responding and the swfkit Has Stop working apeard

i check all code and find the line that make this happend is :

controller.gotoAndStop(1);

it`s very strange and wired cause when i remove this code or even i change the frame number to 2 this problem not apear at all !!

so i`m really curious about that

is this something in my code cause this happend ?  anyone have idea ?

i put the mp3 code here too , maybe it help someone find where could be cause this problem :

//imports the necessary as events
import flash.events.Event
import flash.events.MouseEvent;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.net.URLRequest;
var isPlaying:Boolean = new Boolean();
var pausePosition:Number = new Number();
//Create an instance of the Sound class
var soundClip:Sound = new Sound();
//Create a new SoundChannel Object
var sndChannel:SoundChannel = new SoundChannel();
//Load sound using URLRequest
soundClip.load(new URLRequest("song.mp3"));
//Create an event listener that wll update once sound has finished loading
soundClip.addEventListener(Event.COMPLETE, onComplete, false, 0, true);
controller.addEventListener(MouseEvent.MOUSE_DOWN, btnPressController, false, 0, true);
stop_btn.addEventListener(MouseEvent.MOUSE_DOWN, btnPressStop, false, 0, true);
function onComplete(evt:Event):void {
    //Play loaded sound
    sndChannel = soundClip.play();
    isPlaying = true;
}
function btnPressController(evt:MouseEvent):void
{
    switch(isPlaying)
    {
        case true:
            controller.gotoAndStop(2);
            pausePosition = sndChannel.position; 
            sndChannel.stop();
            isPlaying = false;
        break;
        case false:
            controller.gotoAndStop(1);
            sndChannel = soundClip.play(pausePosition);
            isPlaying = true;
        break;
    }
}
function btnPressStop(evt:MouseEvent):void
{
    pausePosition = 0;
    sndChannel.stop();
    controller.gotoAndStop(2);
    isPlaying = false;
}

i try to contact swfkit and hope to recieve any suggestion or tips but no success at all and this forum is my only chance