Joystick doesn't rise Events

using System;
using System.Drawing;
using System.Drawing.Imaging;
using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
using OpenTK.Input;
 
 
 
namespace Project
{
	public class Rend : GameWindow
	{	
		private JoystickDevice joystick;
		private bool isJoystickExist = false;
 
		public Rend() : base(1200, 800)
		{
			InitEvent();
		}
 
		private void InitEvent()
		{
			if(Joysticks.Count>0){
				Console.WriteLine("Joystick exist = true");
				joystick = Joysticks[0];
				joystick.ButtonDown += new EventHandler<JoystickButtonEventArgs>(Joystick_ButtonDown);
				joystick.ButtonUp += new EventHandler<JoystickButtonEventArgs>(Joystick_ButtonUp);
				joystick.Move += new EventHandler<JoystickMoveEventArgs>(Joystick_Move);
				isJoystickExist = true;
			}
		}
 
		private void Joystick_Move(object sender, JoystickMoveEventArgs e)
		{
			Console.WriteLine("Joystick move");			
		}
		private void Joystick_ButtonUp(object sender, JoystickButtonEventArgs e)
		{
			Console.WriteLine("Joystick button up");
		}
		private void Joystick_ButtonDown(object sender, JoystickButtonEventArgs e)
		{
			Console.WriteLine("Joystick button down");
		}
 
		protected override void OnLoad(EventArgs e)
		{
			base.OnLoad(e);
 
			VSync = VSyncMode.On;
		}
 
		protected override void OnRenderFrame(FrameEventArgs e)
		{
			base.OnRenderFrame(e);
 
		}
 
		protected override void OnUpdateFrame(FrameEventArgs e)
		{
			base.OnUpdateFrame(e);
 
			if(isJoystickExist){
				if (joystick.Button[0])
				{
					Console.WriteLine("Joystick button 1 pressed");
				}
 
				if (joystick.Button[1])
				{
					Console.WriteLine("Joystick button 2 pressed");
				}
 
				if (joystick.Button[2])
				{
					Console.WriteLine("Joystick button 3 pressed");
				}
 
				if (joystick.Button[3])
				{
					Console.WriteLine("Joystick button 4 pressed");
				}
			}		
		}
 
		protected override void OnResize(EventArgs e)
		{
 
		}
	}
}

using System;
 
namespace Project
{
	class MainClass
	{
        [STAThread]
		public static void Main(string[] args)
		{
             using (Rend rend = new Rend())
            {	
                rend.Run(60,60);
            }
 
		}
	}
}