Loading SWF Created in OOP (Getting Error Message)

Question

I created a slideshow using OOP and it works fine when I test it both in 'Test Movie" and 'Publish Preview', yet when I try to load the SWF into my site I keep getting error messages.
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at SlideshowDocumentHD/initializeHD()
Error #2044: Unhandled ioError:. text=Error #2032: Stream Error.
This is the code I was using to test load:
var req:URLRequest = new URLRequest("Main-HD.swf");
var loader:Loader = new Loader();
loader.load(req);
addChild(loader);
I'm pretty new to this, so any help is appreciated.  Again, the slideshow does work, I just need to know how to load the SWF.

Answer 1

1.  Main-HD.swf must be in the same directory as the html that embeds your main (the one that loads your slideshow).
2.  if your swfs and flas are NOT in the same directory, you probably have a path problem.