What is stupid problem with getters and setters?

Yes i tried override. But it says error for openfl test flash

package net.sourceskyboxer.components;
import openfl.display.DisplayObjectContainer;
import openfl.display.Sprite;
import openfl.events.Event;
/**
 * ...
 * @author Jens Eckervogt
 */
class Component extends Sprite
{
	private var _width:Float = 0;
	private var _height:Float = 0;
	private var _tag:Int = -1;
	private var _enabled:Bool = true;
	
	public static var DRAW:String = "draw";
	/**
	 * @param	parent
	 * @param	xpos
	 * @param	ypos
	 */
	public function new(parent:DisplayObjectContainer = null, xpos:Float = 0, ypos:Float = 0) 
	{
		super();
		setMove(xpos, ypos);
		init();
		if (parent != null)
		{
			parent.addChild(this);
		}
	}
	
	
	private function init():Void
	{
		addChildren();
		invalidate();
	}
	
	
	private function addChildren():Void
	{
		
	}
	
	private function invalidate():Void
	{
		draw();
		addEventListener(Event.ENTER_FRAME, onInvalidate);
	}
	
	/**
	 * 
	 * @param	xpos
	 * @param	ypos
	 */
	public function setMove(xpos:Float, ypos:Float):Void
	{
		x = Math.round(xpos);
		y = Math.round(ypos);
	}
	
	/**
	 * 
	 * @param	w
	 * @param	h
	 */
	public function setSize(w:Float, h:Float):Void
	{
		_width = w;
		_height = h;
		dispatchEvent(new Event(Event.RESIZE));
		invalidate();
	}
	
	public function draw():Void
	{
		dispatchEvent(new Event(Component.DRAW));
	}
	
	private function onInvalidate(evt:Event):Void
	{
		removeEventListener(Event.ENTER_FRAME, onInvalidate);
		draw();
	}
	
	/**
	 * 		getters and setters
	 */
	
	public var width(get, set):Float;
	
	override public function set_width(w:Float):Float
	{
		return w = _width;
		invalidate();
		dispatchEvent(new Event(Event.RESIZE));
	}
	
	override public function get_width():Float
	{
		return _width;
	}
	
	
	public var height(get, set):Float;
	
	override public function set_height(h:Float):Float
	{
		return h = _height;
		invalidate();
		dispatchEvent(new Event(Event.RESIZE));
	}
	
	override public function get_height():Float
	{
		return _height;
	}
	
	
	public var tag(get, set):Int;
	
	public function set_tag(value:Int):Int
	{
		return value = _tag;
	}
	
	public function get_tag():Int
	{
		return _tag;
	}
	
	
	public var x(default, null):Float;
	
	override public function set_x(value:Float):Float
	{
		return value = Math.round(x);
	}
	
	
	public var y(default, null):Float;
	
	override public function set_y(value:Float):Float
	{
		return value = Math.round(y);
	}
	
	
	public var enabled(get, set):Bool;
	
	public function set_enabled(value:Bool):Bool
	{
		return value = _enabled;
		mouseEnabled = mouseChildren = _enabled;
		tabEnabled = value;
		alpha = _enabled ? 1.0 : 0.5;
	}
	
	public function get_enabled():Bool
	{
		return _enabled;
	}
}

Output:

net/sourceskyboxer/components/Component.hx:95: characters 8-34 : Redefinition of variable width in subclass is not allowed. Previously declared at flash.display.DisplayObject
net/sourceskyboxer/components/Component.hx:110: characters 8-35 : Redefinition of variable height in subclass is not allowed. Previously declared at flash.display.DisplayObject
net/sourceskyboxer/components/Component.hx:138: characters 8-35 : Redefinition of variable x in subclass is not allowed. Previously declared at flash.display.DisplayObject
net/sourceskyboxer/components/Component.hx:146: characters 8-35 : Redefinition of variable y in subclass is not allowed. Previously declared at flash.display.DisplayObject
net/sourceskyboxer/components/Component.hx:119: lines 119-122 : Field get_height is declared 'override' but doesn't override any field
net/sourceskyboxer/components/Component.hx:104: lines 104-107 : Field get_width is declared 'override' but doesn't override any field
net/sourceskyboxer/components/Component.hx:112: lines 112-117 : Field set_height is declared 'override' but doesn't override any field
net/sourceskyboxer/components/Component.hx:97: lines 97-102 : Field set_width is declared 'override' but doesn't override any field
net/sourceskyboxer/components/Component.hx:140: lines 140-143 : Field set_x is declared 'override' but doesn't override any field
net/sourceskyboxer/components/Component.hx:148: lines 148-151 : Field set_y is declared 'override' but doesn't override any field
Build halted with errors.