Actionscript 3.0 :: Form And Buttons Within External SWF Not Working When Loaded

I'm currently working on a flash site, which consists of a "Main" SWF file that has buttons to load external SWF files. I figured out how to make the external SWF files show on its own layer below other layers on the main time line of the Main SWF. I created a blank movie clip file on it's own layer of the main time line and used this to call out to it:

this.mySWFLoadingClip.addChild(loader);

This worked perfectly. The website so far works perfectly with each page of the website being an externally loaded SWF. The problem I came across today though, is that buttons and text fields within the external SWF files don't work when they are loaded onto the "Main" SWF. They only work when I open the external SWF files individually. I really need to figure out how to make buttons and the text fields within the external SWF files when loaded onto the "MAIN" SWF. I first came across this problem when I tried adding a form that I created to one of the external SWF files called guestlist_page_swf.swf. The form works on its own when I open that SWF individually, but when I try to load that SWF file with the form as a page on my "Main" SWF, the mouse doesn't even recognize that the submit button is a button, and it doesn't allow me to click on the text fields. Here is the link to the site I am having the problem with, and the problem page is the Guest List page:
[URL]

Below is the code from my Main SWF file and the External SWF file with the form on it:

MAIN SWF:

var Xpos:Number = 0.0;
var Ypos:Number = 192.5;
var swf:MovieClip;

[Code].....