Клас кнопки

Код AS3:
package Src.buttons{
import flash.display.*;
import flash.text.*;
import flash.events.Event;
public class btMenu extends flash.display.SimpleButton {
public function btMenu() {//
//trace("1 ");
// (this['caption'] as TextField).text = "sd";_caption;
}
}
}
основной класс

Код AS3:
package Src{
import flash.display.*;
import flash.events.Event;
import flash.text.*;
import Src.buttons.*;
public class GameMenu extends Sprite {
private var GameName:String;
private var GameNameText:TextField;
public var DisplayWidth:uint;
public var DisplayHeight:uint;
private var btPlay: btMenu;
public function GameMenu() {
DisplayWidth = 700;//stage.stageWidth;
DisplayHeight = 525;//stage.stageHeight;
GameName = "Game";
GameNameText = new TextField();
var format:TextFormat = new TextFormat();
format.font="Comic Sans MS";
format.size=50;
GameNameText.defaultTextFormat=format;
GameNameText.text = GameName;
with (GameNameText) {
textColor=0x99cc00;
autoSize = TextFieldAutoSize.LEFT;
selectable = false;
x=(DisplayWidth/2) - (textWidth/2);
y=20;
}
btPlay = new btMenu();
btPlay.x = (DisplayWidth/2) - (btPlay.width/2);
btPlay.y = 200;
addChild(btPlay);
addChild(GameNameText);
}
}
}