Flex/Air Accessing movieclip in loaded swf

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx" 
			   minWidth="400" minHeight="100"
			   >
	<fx:Script>
		<![CDATA[
 
			import mx.controls.Button;
			private var loaderContent1:Object;
			private var loaderContent2:Object;
 
			protected function InitMovieClips(event:Event):void
			{
				var BtnClick:SimpleButton = SimpleButton(loader1.content["BtnClick"]);
				BtnClick.addEventListener(MouseEvent.CLICK, ShowHelloWorldText);
				loaderContent2 = loader2.content;
			}
 
			protected function ShowHelloWorldText(event:MouseEvent):void
			{
				loaderContent2.FunctionInsideSWF(event);
			}
 
 
		]]>
	</fx:Script>
 
	<fx:Declarations>
		<!-- Place non-visual elements (e.g., services, value objects) here -->
	</fx:Declarations>
 
	<mx:HBox backgroundColor="#CCCCCC">
		<mx:SWFLoader id="loader1" source="assets/Loader1.swf" complete="InitMovieClips(event)"/>
		<mx:SWFLoader id="loader2" source="assets/Loader2.swf" complete="InitMovieClips(event)"/>	
	</mx:HBox>
 
</s:Application>