Alpha Tween external swf file

I’m new to Actionscript 3.0 and I’m having trouble with this code. My external swf is loading fine, it’s the alpha tween that does not seem to be responding. I thought if I tween the holder movie clip that would affect the imported swf but it’s not working. If anybody has any solutions that would be much appreciated.

import fl.transitions.Tween;
import fl.transitions.easing.*;

var swfLoader:Loader = new Loader();
var bgURL:URLRequest = new URLRequest(“work.swf”);


swfLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadProdComplete);


function loadProdComplete(e:Event):void
trace(“file loaded”);

function fadeIn(e:Event):void
var tweenfadeIn:Tween = new Tween(hold_mc, “alpha”, None.easeOut, 0, 1, 1, true);