Load external SWF file into another SWF

Hello all.

I've tried loading a .swf file externally into another .swf file on my  local drive, and it works. Now, when I try to Simulate Download, the  preloader in the 2nd file doesn't get played and the images in there  take a while to get displayed.

I need to load a .swf file from a server into the parent .swf file(I'm  working on using a "thin flash file" for added security for the company I  work for - blank file which loads the content from another file on  their server).

So far, I have:

try
{
    var myLoader:Loader = new Loader(); 
    addChild(myLoader);
    var url:URLRequest = new URLRequest("newBook.swf"); 
    myLoader.load(url);
}    
catch (e:Error) 
{
    trace("ruhroh");
}

When I replace the "newBook.swf" with the URL of another .swf, there's just a blank page.

I'm not too sure how to proceed, and I hope you will be able to help me out. I'd greatly appreciate the help.

Many thanks,

-Nazgul