[
function setStage ()
{
	var sw:Number = Stage.width;
	var sh:Number = Stage.height;

/*
Rule for Top/ Right alignment
*/
	cerrar_btn._x = sw - (cerrar_btn.Stage.width + margin);
	cerrar_btn._y = margin
/*
Rule for Bottom / Center alignment
*/
	back_mc._x = sw / 2 - back_mc._width / 2;
	back_mc._y = sh - (back_mc._height + margin);
/*
Rule for Left / left alignment
*/
	pleca_mc._x = margin;
	pleca_mc._y = margin;
/*
Rule for Center / Middle alignment
*/
	menu_mc._x = sw / 2 - menu_mc (Stage.width) / 2;
	menu_mc._y = sh / 2 - menu_mc (Stage.height) / 2;
}

// Add a listener
var stageListener:Object = new Object ();
Stage.addListener (stageListener);

// When the Stage dimensions change...
stageListener.onResize = setStage;

// Call our function to set it all up right!
setStage ();
 ] 

I will apreciate your help a lot.

Jenkah

Good continuation

 function setStage ()
{
	var sw:Number = Stage.width;
	var sh:Number = Stage.height;

	videoMC._x = sw / 2 - 900/ 2;
	videoMC._y = sh / 2 - 400 / 2;

//VideoMC component
}

// Add a listener
var stageListener:Object = new Object ();
Stage.addListener (stageListener);

// When the Stage dimensions change...
stageListener.onResize = setStage;

// Call our function to set it all up right!
setStage ();

If you’re loading in an external SWF, when you reference is width or height you will get the width or height of its content, not of the SWF’s stage as it would appear in the Flash IDE. For example, if you have a SWF thats 400 x 400, but only has a 100 x 100 square on its stage, when you load it into another SWF it’s width will return 100.

Could this be the problem?

// Setup the Stage properties
Stage.scaleMode = "noScale";
Stage.align = "TL";

// The MC being positioned inside the onResize function
var videoMC:MovieClip;
// Create a holder clip inside of it
var holder:MovieClip = videoMC.createEmptyMovieClip( "holder", 0);
// Load your SWF or JPG into that
holder.loadMovie("test.swf");

function setStage ()
{
	var sw:Number = Stage.width;
	var sh:Number = Stage.height;

	videoMC._x = sw / 2 - videoMC._width / 2;
	videoMC._y = sh / 2 - videoMC._height / 2;
}

// Add a listener
var stageListener:Object = new Object ();
Stage.addListener (stageListener);

// When the Stage dimensions change...
stageListener.onResize = setStage;

// Call our function to set it all up right!
setStage ();

Here I am – tHkX 4 your Help

Try adding an extra MovieClip inside your existing MovieClip and then load the swf into that.

For example:

 // The MC being positioned inside the onResize function
var videoMC:MovieClip;
// Create a holder clip inside of it
var holder:MovieClip = videoMC.createEmptyMovieClip( 'holder', 0 );
// Load your SWF or JPG into that
holder.loadMovie( /* etc... */ );