Jukebox play sound only once

integer Touched;
integer listen_handle;
integer chan = -90;
key Toucher;

Dialog()
{
 llListenRemove(listen_handle);
 listen_handle = llListen(chan, "", Toucher, "");
 llSetTimerEvent(120.0);
 llDialog(Toucher,"\nSelect an option:",["Play","Stop"],chan);

}

default
{
  touch_end(integer num)
  {
    Toucher = llDetectedKey(0);
    Dialog();

  }


  listen(integer channel, string name, key id, string msg)
  {

     if(channel == chan)
     {

         if(msg == "Play")
         {


           if(!Touched)
            {

                Touched = TRUE;
                llPlaySound(llGetInventoryName(INVENTORY_SOUND, 0), 1.0);
                Dialog();
            }

            else
            {

               Dialog();

            }

         }

         else if(msg == "Stop")
         {

            Touched = FALSE;
            llStopSound();
            llListenRemove(listen_handle);
         }

     }

  }

  timer()
  {

    llListenRemove(listen_handle);

  }

}