WebService asmx error: Could not establish connection to network

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C#2.0

C#

hi,

My webservice code is,

using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
    public Service () {

        //Uncomment the following line if using designed components
        //InitializeComponent();
    }

    [WebMethod]
    public string HelloWorld() {
        return "Hello World";
    }
    [WebMethod]
    public int Addtion(int x, int y)
    {
        return x + y;
    }
}

and my application code is:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;


namespace SimpleApplication

{
    public partial class Form1 : Form
    {
        localhost.Service loc = new SimpleApplication.localhost.Service();
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int a, b, c;
            a = Convert .ToInt16 ( textBox1.Text);
            b = Convert.ToInt16 ( textBox2.Text);
            c = loc.Addtion(a, b);
            textBox3.Text = c.ToString();
            MessageBox.Show("" + c);
        }
    }
}

in REFERENCE.CS page i will get error like this "Could not establish connection to network"

[System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/Addtion", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
        public int Addtion(int x, int y) {
            object[] results = this.Invoke("Addtion", new object[] {
                        x,
                        y});
            return ((int)(results[0]));
        }