Problem with texture

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using OpenTK;
using OpenTK.Graphics.OpenGL;
 
namespace TestProject
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private int textID;
        private void glControl1_Load(object sender, EventArgs e)
        {
            TexLib.TexUtil.InitTexturing();
            textID = TexLib.TexUtil.CreateTextureFromBitmap(Resource1.round2);
            int Width = glControl1.Width;
            int Height = glControl1.Height;
            GL.Viewport(new System.Drawing.Size(Width, Height));
            GL.MatrixMode(MatrixMode.Projection);
            GL.LoadIdentity();
            GL.Ortho(0, Width, 0, Height, -1, 1);
        }
        private void glControl1_Paint(object sender, PaintEventArgs e)
        {
            GL.Clear(ClearBufferMask.ColorBufferBit);
            GL.MatrixMode(MatrixMode.Modelview);
            GL.LoadIdentity();
 
            GL.BindTexture(TextureTarget.Texture2D,textID);
            GL.Begin(BeginMode.Quads);
            GL.TexCoord2(0,1); GL.Vertex2(10,10);
            GL.TexCoord2(1, 1); GL.Vertex2(100, 10);
            GL.TexCoord2(1, 0); GL.Vertex2(100, 100);
            GL.TexCoord2(0,0); GL.Vertex2(10, 100);
            GL.End();
 
            glControl1.SwapBuffers();
        }
    }
}