Actionscript 3 AS3将从孩子处转到prevFrame

好的，所以我在更改帧方面有问题。（我会一步一步地说）基本上我是从jpeg->MovieClip（记录）创建的，在这个MovieClip中我手动创建了按钮。然后在MainClass by addchild（记录）中我将其添加到舞台上。现在通过修改类记录，我创建了功能按钮，现在点击它，我想进入前一帧

public class MainClass extends MovieClip
{
    var x:boolean=false;
    static var ramka3:MovieClip;
    public function MainClass()
    {
        stop();
        this.addEventListener(Event.ENTER_FRAME,rrr);
    }
    function rrr():void
    {
     if(x==false)
     {
       x=true;
        ram3 = new record ();
        ram3.x = stage.stageWidth / 20;
        ram3.y = stage.stageHeight / 4;
        ram3.width = stage.stageWidth / 1.1;
        ram3.height = stage.stageHeight / 2;
        addChild(record);
      }
    }

记录类别：

public class record extends MovieClip
{
    public function record()
    {
        Restart.addEventListener(MouseEvent.CLICK,RestartGame);
        MainMenu.addEventListener(MouseEvent.CLICK,RestartGame);

    }
    function RestartGame(event:MouseEvent):void
    {
        var button:DisplayObject = DisplayObject(event.currentTarget);
        if (button==Restart)
        {
            gotoAndStop(2);//nothing do
        }
        if (button==MainMenu)
        {
        }
    }

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请把你试过的代码贴出来。所以我问没人知道，发生了什么事？