Java中native方法学习

我使用flex中的sequence来实现顺序效果播放，主要想实现将一张图片从A点移动到B点，再从B移动到C，以此类推。我采用move来实现移动效果，先写个mymove类继承move，在构造函数中设置好move的属性，再利用循环创建mymove对象并给各个属性设置值，并将mymove对象添加到sequence中，最后播放sequence中各个动画大的效果，结果出乎意料的是，根本没反应，一下是代码，请各位达人帮忙解决
mymove类

package
{
import flash.geom.Point;

import mx.effects.Move;

public class Mymove extends Move
{

public function Mymove(p1:Point,p2:Point,target:Object)
{

var move:Move=new Move(target);
move.xFrom=p1.x;move.yFrom=p1.y;
move.xTo=p2.x;move.yTo=p2.y;
//move.play();
move.duration=2000;
}

}
}

主程序代码：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="initApp()">
<mx:Script>
<![CDATA[

import mx.effects.Sequence;

internal function initApp():void{
var i:int;
var mymove:Mymove;
var p1:Point,p2:Point;
var points:Array=new Array(
new Point(0,0),new Point(0,50),
new Point(50,50),new Point(50,100),
new Point(100,100),new Point(100,50));
for(i=0;i<5;i++){
p1=points[i];p2=points[i+1];
mymove=new Mymove(p1,p2,img);
sequence.addChild(mymove);

}
sequence.play();
}

]]>
</mx:Script>
<mx:Sequence id="sequence">	</mx:Sequence>
<mx:Image id="img" source="add_reviewer.gif">

</mx:Image>
<mx:Button x="212" y="297" label="Button" id="btn" click="btn.label=sequence.children.length.toString();"/>
</mx:Application>
还是不行