         {
             if (_placeHolderGroup != null)
             {
-                var sourceContent:Array = _placeHolderGroup.mxmlContent;
+                var sourceContent:Array = _placeHolderGroup.getMXMLContent();
                 
                 contentGroup.mxmlContent = sourceContent ? sourceContent.slice() : null;
                 

                
            contentGroupProperties = newContentGroupProperties;
            
            var myMxmlContent:Array = contentGroup.mxmlContent;
            
            if (myMxmlContent)
            {

     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public function getHorizontalScrollPositionDelta(navigationUnit:uint):Number
    {
        return (contentGroup) ?
            contentGroup.getHorizontalScrollPositionDelta(navigationUnit) : 0;     
    }
    
    /**
     *  @inheritDoc
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public function getVerticalScrollPositionDelta(navigationUnit:uint):Number
    {
        return (contentGroup) ? 
            contentGroup.getVerticalScrollPositionDelta(navigationUnit) : 0;     
    }

    //--------------------------------------------------------------------------
