Targeting the main timeline from loaded swf

Hi everyone

well I have an swf that loads an external swf with this code:
loadMovie(“Portfolio_1.swf”,0); [so far so good!]

but now from inside Portfolio_1.swf I want to go back to the main
timeline to “Scene2, porfolio” (name of scene,frame)
…so I used this code on in a frame targeting the back button in Portfolio_1.swf coz I
thought it would take me to the main movie on frame “portfolio”

code:
Code:
back_btn.onRelease=function() {

_parent.gotoAndStop("Scene 2", "portfolio");

} 

PLEASE HELP…!! Thanks