ActionScript 3.0 :: Activating Buttons And Loaders From Child SWF Page

Background: I have an Index.SWF that loads a Home.SWF. The website has essentially three layers, top layer is menu bar, middle layer is content, bottom layer is links to home page and e-mail. All the buttons on the top and bottom layers work. When I go to add a new button to the middle layer of Home.swf. I get all kind of errors associated with not referencing the right objects or having undefined objects.

I believe my structure is as follows:
> Index
>> Home
>>> Any other SWF through "myLoader" object and buttonclick function

Here's the code:
Select allvar myLoader:Loader = new Loader();
addChild(myLoader);
function buttonClick(event:MouseEvent):void{
gotoAndStop(event.target.name);
this.myLoader.load(new URLRequest(event.target.name + ".swf"));
[Code] .....

So here's the structural question, "where do I define my new button?" and what code do I use so that the new button is placed on the home page works with the myLoader and buttonclick function located in the parent page? I have the same structural question, if I decide to add a loading status message, if "the pitch" button is clicked.