actionscript 动态创建ViewStack

[EasonTG]

package com.fairycomic
{
import com.fairycomic.CompanyManage;

import flash.net.LocalConnection;

import mx.containers.ViewStack;
import mx.controls.Alert;

import spark.components.Application;
import spark.components.BorderContainer;
import spark.components.NavigatorContent;


public class MainView extends Application
{
private var conn:LocalConnection;
public var m_CompanyManage:CompanyManage;
public var vs:ViewStack;
public var ng:NavigatorContent;

public function MainView()
{
super();

this.creationPolicy="all";

conn=new LocalConnection();
conn.client=this;
try{
conn.connect("LocalConnectionTest");
}
catch(error:ArgumentError){
Alert.show("名LocalConnectionTest的Wf对");
}
}

public function testHandler(msg:String):void{
Alert.show("Receiver Info:"+msg);
if(msg=="公司管理")
{
vs.selectedIndex=0;
}
else
{
}
}

protected override function createChildren():void
{
super.createChildren();

ng =new NavigatorContent();
ng.label="公司管理";
ng.percentHeight=100;
ng.percentWidth=100;
m_CompanyManage=new CompanyManage();
m_CompanyManage.percentHeight=100;
m_CompanyManage.percentWidth=100;

ng.addChild(m_CompanyManage);

vs=new ViewStack();
vs.addChild(m_CompanyManage);
vs.selectedChild=m_CompanyManage;

this.addChild(vs);

}

}
}

生成SWC文件被外部调用时为什么出不来呢？？