Web Services is not call at the web page

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Services;

using System.Collections.Specialized;

using System.Text.RegularExpressions;

using System.Data;

using System.Data.SqlClient;

using System.Configuration;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.IO;

using System.Web.SessionState;

namespace FTSUPPRPB.WebRoot

{

///

/// Summary description for WebService1

///

[WebService(Namespace = "http://tempuri.org/")]

[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

[System.ComponentModel.ToolboxItem(false)]

// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.

[System.Web.Script.Services.ScriptService]

public class WebService1 : System.Web.Services.WebService

{

//HttpCookie getCookie = System.Web.HttpContext.Current.Response.Cookies["usermaster"];

SqlCommand cmd;

HttpCookie getCookie;

string cons = ConfigurationManager.ConnectionStrings["con"].ConnectionString;

HttpSessionState session = HttpContext.Current.Session;

[WebMethod]

public string HelloWorld()

{

return "Hello World";

}

[WebMethod]

public List fillchart(int type)

{

SqlConnection con = new SqlConnection(cons);

List result = new List();

cmd = new SqlCommand("select count(newfile.fileid) as filenu ,m.firstnm from newfile newfile inner join master_employee m on m.employeeid=newfile.status group by m.firstnm", con);

con.Open();

//cmd.CommandType = CommandType.StoredProcedure;

//cmd.Parameters.AddWithValue("@qrytype", "PIS_DG_ZONE");

//cmd.Parameters.AddWithValue("@type", type);

SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);

Zone zn;

while (dr.Read())

{

zn = new Zone();

zn.ZoneName = dr["firstnm"].ToString();

zn.AVL = Convert.ToInt32(dr["filenu"].ToString());

//zn.ALC = Convert.ToInt32(dr["ALC"].ToString());

//zn.VAC = Convert.ToInt32(dr["VAC"].ToString());

//zn.dtvalue = dr["AVL"].ToString() + "$" + dr["ALC"].ToString() + "$" + dr["VAC"].ToString();

result.Add(zn);

}

return result;

}

public class Zone

{

public string ZoneName;

public int AVL;

}