Flash cs6 AS3 1119错误,通过静态类型Class的引用未定义属性READY

如何解决问题? 我使用Flash CS6和 as3 .

输出:

符号“cinematography_mc”,层“AS3”,第1帧,第31行1119:访问 可能未定义的属性READY的 类型Class。

import fl.video.*;
import flash.events.MouseEvent;
import flash.sampler.pauseSampling;

var flvPlayer:FLVPlayback = new FLVPlayback();
addChild(flvPlayer);

flash.events.Event.MOUSE_LEAVE;

if(!stage.hasEventListener("Leave"))
{
    stage.addEventListener("Leave", __onLeaveThis);
}

function __onLeaveThis(e:Event):void
{
    myVideo.stop();
}

//The next line assumes you have copied the skin file to the directory
//that contains the published SWF file. If you are testing the 
//application in Flash Professional, this is the same directory as the
//FLA file, too.

function readyHandler(event:VideoEvent):void
{
    // Pause until the video can play till the end
    myVideo.pause();
    myVideo.playWhenEnoughDownloaded();
}

myVideo.addEventListener(VideoEvent.READY, readyHandler);

var mybtn:Array = new Array(Movie1_btn, Movie2_btn, Movie3_btn, Movie4_btn, Movie5_btn, Movie6_btn, Movie7_btn, Movie8_btn, Movie9_btn);

for (var i = 0; i < mybtn.length; i++)
{
    mybtn[i].addEventListener(MouseEvent.CLICK, clickhandler);

    function clickhandler(event:MouseEvent):void
    {
        if (event.target == Movie1_btn)
        {
            myVideo.source = "1_Bad Water Sequence.mov";
        }
        else if (event.target == Movie2_btn)
        {
            myVideo.source = "2_Nat Geo Clips_Red Wolf Docu.mp4";
        }
        else if (event.target == Movie3_btn)
        {
            myVideo.source = "3_News_Anthrax_Postal Story.mov";
        }
        else if (event.target == Movie4_btn)
        {
            myVideo.source = "4_Energy Ducumentary 2 min Clip.mov";
        }
        else if (event.target == Movie5_btn)
       {
           myVideo.source = "5_Wildlife_Scenic_Reel.mov";
       }
       else if (event.target == Movie6_btn)
       {
           myVideo.source = "6_Intro Title Sequence for Mt.Rushmore    Webcasts.mov";
       }
       else if (event.target == Movie7_btn)
       {
           myVideo.source = "7_PowWow Ancestry Dream Sequence.mov";
       }
       else if (event.target == Movie8_btn)
       {
           myVideo.source = "8_Fence Fixin-Western style-L.mov";
       }
       else if (event.target == Movie9_btn)
       {
           myVideo.source = "9_Docu_3 separate Clips.mov";
       }
       myVideo.stop()
    }
}

stop();