Help with UI

[34321-resources.zip|34321]Why my window dont work on start? (watch video pls)

https://www.dropbox.com/s/k2tuwpfef4t5t9p/UI%20Window.flv?dl=0

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class UIWindow : MonoBehaviour {
	public RectTransform windowRect;						//UI Window - Main rect
	public RectTransform dragRect;							//UI Window - Drag rect
	public RectTransform titleRect;							//UI Window - Title rect
	public RectTransform btnCloseRect;						//UI Window - Close Button rect
	public RectTransform contentHolderRect;					//UI Window - Content Holder rect
	public RectTransform contentRect;						//UI Window - Content rect

	public string title;
	[Range(0, 10)] public int padding;								//UI Window - Padding
	[Range(300, 2000)] public int width, height;					//UI Window - Width and Height
	[Range(20, 100)] public int widthBtnClose, heightBtnClose;		//Button Close - Width and Height



	void Awake() {
		ResetWindow();
	}

	public void ResetWindow() {
		titleRect.GetComponent<Text>().text = title;
		
		windowRect.anchoredPosition	= new Vector2(padding, -padding);
		windowRect.sizeDelta		= new Vector2(width, height);
		
		titleRect.anchoredPosition	= new Vector2(padding, -padding);
		titleRect.sizeDelta			= new Vector2(width - (widthBtnClose + 2 * padding), heightBtnClose);
		
		dragRect.anchoredPosition	= new Vector2(0, 0);
		dragRect.sizeDelta			= new Vector2(width, heightBtnClose + 2 * padding);
		
		btnCloseRect.anchoredPosition	= new Vector2(-padding, -padding);
		btnCloseRect.sizeDelta			= new Vector2(widthBtnClose, heightBtnClose);
		
		contentRect.anchoredPosition	= new Vector2(0, -(heightBtnClose + 2 * padding));
		contentRect.sizeDelta			= new Vector2(width, height - (heightBtnClose + 2 * padding));
	}

	public void ShowWindow() {
		this.gameObject.SetActive(true);
	}

	public void CloseWindow() {
		this.gameObject.SetActive(false);
	}

	public void DestroyWindow() {
		Destroy(this.gameObject);
	}
}