flex与html交互无法进行参数传递

程序如下：
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" minWidth="955" minHeight="600" creationComplete="onCreateComplete();">

<mx:Script>
<![CDATA[
[Bindable]
public var param1:String;
[Bindable]
public var param2:String;
private function onCreateComplete() : void
{
var parameters : Object = Application.application.parameters;
param1= parameters.param1;
param2= parameters.param2;

}
]]>
</mx:Script>
<mx:Label text="这是参数1：{param1}"/>
<mx:Label text="这是参数2： {param2}"/>
</mx:Application>
在编译后的外包html中这样写了
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="100%" height="100%" id="first">
                <param name="movie" value="first.swf" />
                <param name="quality" value="high" />
                <param name="bgcolor" value="#ffffff" />
                <param name="allowScriptAccess" value="sameDomain" />
                <param name="allowFullScreen" value="true" />
               
                <object type="application/x-shockwave-flash" data="first.swf" width="100%" height="100%">
                    <param name="quality" value="high" />
                    <param name="bgcolor" value="#ffffff" />
                    <param name="allowScriptAccess" value="sameDomain" />
                    <param name="allowFullScreen" value="true" />
                    <param name="flashVars" value="param1=one&param2=two" />
     <embed src="first.swf" quality="high" bgcolor="${bgcolor}"
         width="${width}" height="${height}" name="first" align="middle" allowScriptAccess="sameDomain"
         type="application/x-shockwave-flash"
         pluginspage="http://www.adobe.com/go/getflashplayer"
         flashVars ="param1=one&param2=two"/>
                    
             
                </object>
               
            </object>
结果运行出来显示的绑定值为null,没有传递成功，求解！