Load SWF File in a Flash File.

Hello,
I want to load a SWF File in a Flash File. I have put the following code in a keyframe in my flash movie:
var request:URLRequest = new URL Request("header.swf");
var load:Loader = new Loader()
loader.load(request);
addChild(loader);

The SWF file ist loading in the Flash File.
How can I set the exact position where the SWF File is loading.

I use FLASH CS3 and Action Script 3.0

Thank you very much!