Flash can't access class after loading an external swf

1

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at Drawing/::init()

From my main menu when you click the contact button, it loads contact.swf

function downContact(MouseEvent):void{
	var request:Loader = new Loader();
request.load(new URLRequest ("Contact.swf"));
loadMC.addChild(request)
}

contact.swf has a class attached to it called Drawing.as, and for some reason flash can’t access it(works fine by itself)

do I have to also load the actionscript file? thanks! (i have a couple more questions after i get this part fixed)