Problems targeting a loaded swf

When you click the about button on my site, I am using this function to load in an external swf, about.swf.

When I click on another nav button, I want to communicate with the about.swf and call a function within that swf called bailout().

But how do I target it?

Nothing I try works. I’ve messed with getChildAt but don’t know how it works.
Would it be … theholder.aboutLoad.bailout()??? That doesn’t work.

How do i target the function within the about.swf file? Thanks.

function aboutGo(){

var aboutLoad = new Loader();

//theholder.removeChildAt(0);
if(theholder.numChildren){

theholder.removeChildAt(0);
}

theholder.addChild(aboutLoad);
aboutLoad.load(new URLRequest(“about.swf”));

}