Stuck in autocomplete using javascript in asp.net

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ASP.NET

Javascript

This is my javascript :

<script src="js/jquery.js" type="text/javascript"></script>
     <link href="css/default.css" rel="stylesheet" type="text/css"  media="screen" />
    <link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css">
        <script src="http://code.jquery.com/jquery-1.9.1.js"></script>
        <script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
        <script language="javascript" type="text/javascript">
            $(function () {
                $('#<%=txtSearch.ClientID%>').autocomplete({
                    source: function (request, response) {
                        $.ajax({
                            url: "Members1.aspx/GetName",
                            data: "{ 'pre':'" + request.term + "'}",
                            dataType: "json",
                            type: "POST",
                            contentType: "application/json; charset=utf-8",
                            success: function (data) {
                                response($.map(data.d, function (item) {
                                    return { value: item }
                                }))
                            },
                            error: function (XMLHttpRequest, textStatus, errorThrown) {
                                alert(textStatus);
                            }
                        });
                    }
                });
            });
</script>

this is my CS code

public partial class CP_News : System.Web.UI.Page
{
 public string msg2;
 static string search = "";
    SqlConnection cnn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString2"].ConnectionString); 
    protected void Page_Load(object sender, EventArgs e)
    {

        if (!IsPostBack)
        {

            if (Session["name"] == null)
            {
                Response.Redirect("Login.aspx");
            }
            else
            {
                           
                //BindRepeater();
                allBindRepeater();
                
            }
        }
        search = DropDownListSearch.SelectedItem.Text;

    }

    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public static List<string> GetName(string pre)
    {


        List<string> allSearchName = new List<string>();



        string key = search;
        using (SqlConnection conn = new SqlConnection())
        {
            conn.ConnectionString = ConfigurationManager
                    .ConnectionStrings["ConnectionString2"].ConnectionString;



            using (SqlCommand cmd = new SqlCommand())
            {
                cmd.Connection = conn;
                conn.Open();



         if (key == "Mobile")
                {
                    cmd.CommandText = "SELECT ContactNo FROM PersonalInformation where " +
              "ContactNo like N'" + pre + "%'";
                    using (SqlDataReader sdr = cmd.ExecuteReader())
                    {
                        while (sdr.Read())
                        {
                            allSearchName.Add(string.Format("{0}", sdr["ContactNo"]));
                        }
                    }

                }




                conn.Close();
            }
            return allSearchName;
        }



    }

for the textbox :
<asp:TextBox ID="txtSearch" runat="server" >


After testing using breakpoint, I found that the control doesn't move inside the "Getname" Function while typing in the textbox.

Pleas let me know where m i wrong!!