can't package swf animation inside AIR app

Hi

I included a little animation today in my AIR app using a swf movie clip as below

    private var myLoader:Loader = new Loader();  // connecting animation
    private var url:URLRequest = new URLRequest("../../../data/ConnectingAnim.swf");
    .... code to add the loader and position it

It works fine when I deploy to my device via the USB but when I try to package it using Build -> Package AIR Application the resulting ipa isn't right. The screen with the animation is broken.
Am I missing something?

Thanks!