[Resolvido] aumentar tamanho de imagem em as3

bom , tenho esse codigo abaixo tudo funcionante , mas tenho que aumentar a altura das imagens e nao estou conseguindo ..

// Tweener
// http://code.google.com/p/tweener/

import caurina.transitions.Tweener;

slider_info.text = "carregando...";
link_title.text = "";
link_description.text = "";

var folder:String = "thumbnails/";
var start_from:Number = 0;
var no_of_tn:Number = 5;
var i:Number;
var tn:Number = 0;
var current_no:Number = 0;

var tween_duration:Number = 0.8; // seconds

var total:Number;
var flashmo_xml:XML;
var flashmo_tn_list = new Array();
var thumbnail_group:MovieClip = new MovieClip();

this.addChild(thumbnail_group);
thumbnail_group.mask = slider_mask;

function load_gallery(xml_file:String):void

{

	var xml_loader:URLLoader = new URLLoader();
	xml_loader.load( new URLRequest( xml_file ) );
	xml_loader.addEventListener(Event.COMPLETE, create_thunbnail_slider);
}

function create_thunbnail_slider(e:Event):void

{

	flashmo_xml = new XML(e.target.data);
	total = flashmo_xml.thumbnail.length();

	for( i = 0; i < total; i++ )
	{
 flashmo_tn_list.push( {
 filename: flashmo_xml.thumbnail[i].filename.toString(),
 title: flashmo_xml.thumbnail[i].title.toString(),
 description: flashmo_xml.thumbnail[i].description.toString(),
 url: flashmo_xml.thumbnail[i].url.toString(),
 target: flashmo_xml.thumbnail[i].target.toString()
 } );
	}
	load_tn();
}

function load_tn():void

{

	var pic_request:URLRequest = new URLRequest( folder + flashmo_tn_list[tn].filename );
	var pic_loader:Loader = new Loader();

	pic_loader.load(pic_request);
	pic_loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, tn_progress);
	pic_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, tn_loaded);
	tn++;
}

function tn_progress(e:ProgressEvent):void

{

	slider_info.text = "carregando... " + tn + " de " + total;
}

function tn_loaded(e:Event):void

{

	if( tn < total )
 load_tn();
	else
 slider_info.text = "";

	var flashmo_tn_bm:Bitmap = new Bitmap();
	var flashmo_tn_mc:MovieClip = new MovieClip();

	flashmo_tn_bm = Bitmap(e.target.content);
	flashmo_tn_bm.smoothing = true;

	flashmo_tn_mc.addChild(flashmo_tn_bm);
	flashmo_tn_mc.name = "flashmo_tn_" + thumbnail_group.numChildren;
	flashmo_tn_mc.buttonMode = true;
	flashmo_tn_mc.addEventListener( MouseEvent.MOUSE_OVER, tn_over );
	flashmo_tn_mc.addEventListener( MouseEvent.MOUSE_OUT, tn_out );
	flashmo_tn_mc.addEventListener( MouseEvent.CLICK, tn_click );
	flashmo_tn_mc.x = thumbnail_group.numChildren * 150;

	thumbnail_group.addChild( flashmo_tn_mc );
}

function tn_over(e:MouseEvent):void

{

	var mc:MovieClip = MovieClip(e.target);
	current_no = parseInt(mc.name.slice(11,13));
	Tweener.addTween( mc, { alpha: 0.5, time: tween_duration, transition: "easeIn" } );

	link_title.text = flashmo_tn_list[current_no].title;
	link_description.text = flashmo_tn_list[current_no].description;
}

function tn_out(e:MouseEvent):void

{

	var mc:MovieClip = MovieClip(e.target);
	current_no = parseInt(mc.name.slice(11,13));
	Tweener.addTween( mc, { alpha: 1, time: tween_duration, transition: "easeOut" } );

	link_title.text = "";
	link_description.text = "";
}

function tn_click(e:MouseEvent):void

{

	var mc:MovieClip = MovieClip(e.target);
	current_no = parseInt(mc.name.slice(11,13));
	navigateToURL( new URLRequest( flashmo_tn_list[current_no].url ),
 flashmo_tn_list[current_no].target );
}

function move_slider():void

{

	if( total - start_from < no_of_tn )
 start_from = total - no_of_tn;
	if( start_from < 0 )
 start_from = 0;

	Tweener.addTween( thumbnail_group, { x: - start_from * 250,
 time: tween_duration, transition: "easeInOutQuart" } );
}

flashmo_previous.addEventListener( MouseEvent.CLICK, move_left );
flashmo_next.addEventListener( MouseEvent.CLICK, move_right );

function move_left(e:MouseEvent):void

{

	start_from -= no_of_tn;
	move_slider();
}

function move_right(e:MouseEvent):void

{

	start_from += no_of_tn;
	move_slider();
}