How to integrate crm 2013 with asp.net page

Hi,

I want to create contact through asp.net application.

I added organization service as a service reference

here is my code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ServiceModel.Description;
using Microsoft.Xrm.Sdk.Client;
using System.Net;
using Microsoft.Xrm.Sdk;
using System.ServiceModel;
using System.IdentityModel;
using System.Web.SessionState;
public partial class register : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btnLogin_Click(object sender, EventArgs e)
    {
        {
            try
            {
               
                    //Authenticate using credentials of the logged in user;        

                    ClientCredentials Credentials = new ClientCredentials();

                    Credentials.UserName.UserName = "web.agent";
                    Credentials.UserName.Password = "pass@word1";

                    // Credentials.Windows.ClientCredential = CredentialCache.DefaultNetworkCredentials;

                    //This URL needs to be updated to match the servername and Organization for the environment.

                    Uri OrganizationUri = new Uri("http://mozzo:5555/MozzoLab/XRMServices/2011/Organization.svc");

                    Uri HomeRealmUri = null;



                    //OrganizationServiceProxy serviceProxy;        

                    using (OrganizationServiceProxy serviceProxy = new OrganizationServiceProxy(OrganizationUri, HomeRealmUri, Credentials, null))
                    {

                        IOrganizationService service = (IOrganizationService)serviceProxy;




                        //Instantiate the contact object and populate the attributes.

                        Entity contact = new Entity("contact");

                        contact["FirstName"] = txtFirstName.Text.ToString();

                        contact["LastName"] = txtLastName.Text.ToString();

                        contact["FullName"] = txtFirstName.Text.ToString() + " " + txtLastName.Text.ToString();

                        contact["new_UserName"] = txtUsername.Text.ToString();

                        contact["new_Password"] = txtPassword.Text.ToString();

                        Guid newContactId = service.Create(contact);


                        //This code will clear the textboxes after the contact is created.

                        txtFirstName.Text = "";

                        txtLastName.Text = "";

                        txtPassword.Text = "";

                        txtReEnterPassword.Text = "";

                        string message = "Data Saved Successfully.";

                        System.Text.StringBuilder sb = new System.Text.StringBuilder();

                        sb.Append("<script type = 'text/javascript'>");

                        sb.Append("window.onload=function(){");

                        sb.Append("alert('");

                        sb.Append(message);

                        sb.Append("')};");

                        sb.Append("</script>");

                        ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", sb.ToString());
                    }
                }
            

            catch (Exception)
            {
                txtFirstName.Text = "";

                txtLastName.Text = "";

                txtPassword.Text = "";

                txtReEnterPassword.Text = "";

                string message = "Please Try Again.";

                System.Text.StringBuilder sb = new System.Text.StringBuilder();

                sb.Append("<script type = 'text/javascript'>");

                sb.Append("window.onload=function(){");

                sb.Append("alert('");

                sb.Append(message);

                sb.Append("')};");

                sb.Append("</script>");

                ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", sb.ToString());
            }
           // Session["login"] = 1;
        }
    }
}