Loading as2 swf into as3

i have been tryin to load an external swf which was compiled banner in as2 version , into as3 portfolio but i keep gettin this error

ArgumentError: Error #2180: It is illegal to move AVM1 content (AS1 or AS2) to a different part of the displayList when it has been loaded into AVM2 (AS3) content.
    at flash.display::DisplayObjectContainer/addChild()
    at App::SwfPasser/onComplete()

SwfPasser - is my own class with the ability to load the content of the swf wiv, urloader and urlrequest and the basics of a preloader…

kind regards