Flash Memory Problem

Thanks again!
Can you tell me one thing..
Loader is the only component for memory leak problem (if we don't remove the references) or there are some others too , like URLLoader and to some extend I've read about ExtenalInteface.
But when I try to create the URLLoader as a child of any movie clip it simply denies or through es error. Does that mean we can't remove the reference of URLLoader OR just by using removeEventListner and passing the URLLoader variable "null" will mark it for garbage collection?
awaiting for you reply.

Thanks for the early reply.
I have eliminated URLLoader and ExternalInterface and could find the Loader as a culprit.
I have implemented the expected way as you have shown for the Loader "GC in action way".
But still the memory is not released, it starts from 65,555k and goes beyond 500,000k on every click it increases by 5mb. I don't see the GC is working. What would be the problem? Once again thanks for the early reply. and hope the same in future...

I'm using one container to house these external movie clips. That's how I always did it in AS2. Is that a bad idea in AS3? I'm also using only 1 loader. So, at the end of each movie clip this function is called:

function movieLoad(){
var request:URLRequest = new URLRequest(nextMovie + ".swf");
loader.load(request);
container.addChild(loader);
}

There must be some better way to do this?

So, I'm guessing that my externally loaded swf is considered an object. And, that object needs to be nulled? How would one go about nulling an swf file?

Perhaps "very frustrating" would be a better description of my experience with these memory leaks. It doesn't seem like the old garbage collector is doing anything for me.

Honestly, I can't tell if it's reusing the swf or not? Perhaps, my code will tell?

// This loads the first movie
var loader:Loader = new Loader();
var request:URLRequest = new URLRequest(nextMovie + ".swf");
loader.load(request);
container.addChild(loader);

// This loads the next movie according to the which button the user pressed
function movieLoad(){
container.removeChild(loader);
var request:URLRequest = new URLRequest(nextMovie + ".swf");
loader.load(request);
container.addChild(loader);
}

Thanks for the tip. I've now added weak references to my event listeners, but I'm still having the same problem. It seems that each time an external swf is loaded into my loader the site keeps growing and growing. My old sites in actionscript 2 only occupied about 70MB of Mem Usage. I must be missing something in actionscript 3?