Passing Variables between two AS3 swf's

I am trying to pass value and string from AS3 main.swf to AS3 child.swf loaded in it.
But, Nothing is working and i can't get the value from one to another. As Beginner in AS3, i was working for a long time and still i face these problems and no output yet.
Can any one please help me out in getting value from main.swf to child.swf and also child.swf to main.swf

I got some samples in web and i didn't get it properly.
The sample in child.swf is ....
function showNumber(n:Number):void
{
trace("The number is: " + n);
}

Sample in Main.swf is....
var clip:MovieClip = loader.getChildAt(0) as MovieClip;
clip.showNumber(23);

But, i didn't get the output...

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Few Scripts from my Main.swf

var xmlData:XML;
var tocData:XML;
var xp:Number;
var fn:Number;
var loader:Loader = new Loader();

function createtext(fn, xp) {
gloval.toload = fn;
var button:Sprite = new Sprite();
var tag_button:Sprite = new Sprite();
var modi_button:Sprite = new Sprite();
var mtitle_button:Sprite = new Sprite();
var ctitle_button:Sprite = new Sprite();
var ltitle_button:Sprite = new Sprite();
var stitle_button:Sprite = new Sprite();
var sid_button:Sprite = new Sprite();
var textLabel:TextField = new TextField();
gloval.x_pos = xp;
gloval.y_pos = gloval.y_pos + 25;
ButtonInteractivity();
function ButtonInteractivity() {
//trace("ButtonInteractivity()");
drawButton();
button.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
//hideclip.scrollbar.text.removeChild(button);
hideclip.scrollbar.text.addChild(button);
}
function drawButton():void {
button.name = gloval.dummy;
tag_button.name = gloval.slidetag;
modi_button.name = gloval.slidemodi;
mtitle_button.name = gloval.mtitle;
ctitle_button.name = gloval.ctitle;
ltitle_button.name = gloval.ltitle;
stitle_button.name = gloval.stitle;
sid_button.name = gloval.sid;
//trace("Button Name: "+button.name);
//trace("Initial Button Position: X="+button.x+" Y="+button.y);
textLabel.text = gloval.sn;
textLabel.autoSize = "left";
button.x = gloval.x_pos;
button.y = gloval.y_pos;
//trace("Aligned Button Position: X="+button.x+" Y="+button.y);
textLabel.selectable = false;
button.addChild(textLabel);
}

function mouseDownHandler(event:MouseEvent):void {
trace("Clicked Object: "+button.name);
gloval.tname = button.name;
gloval.pname = gloval.cname;
gloval.cname = gloval.tname;
trace("sunnnn :"+gloval.cname);
var request:URLRequest = new URLRequest(gloval.cname);
loader.unload();
loader.load(request);
cont_loder.addChild(loader);
trace("Clicked Object text: "+textLabel.text);
//mod_title.text = textLabel.text;
mod_title.text = mtitle_button.name;
chp_title.text = ctitle_button.name;
les_title.text = ltitle_button.name;
sld_title.text = stitle_button.name;
sld_tag.text = tag_button.name;
last_modi.text = modi_button.name;
sid.text = sid_button.name;
/*cont_loder.name = "passcont";
trace("cont_loder.name = "+cont_loder.name);
MovieClip(cont_loder).asdf = "yyyyyyyyyy";
this.cont_loder.asdf = "yyyyyyyyyy";
cont_loder.sample= "sdfsdaf";*/
//var clip:MovieClip = cont_loder.getChildAt(0) as MovieClip;
var clip:MovieClip = cont_loder.currentTarget;
clip.showNumber(23);
}
}

In Child.swf i had created a textfield.

Can any one send me a sample working file to pass values between two AS3 swf