Web service runs on local host but not online

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C#

I have used a autocomplete extender for autocomplete search on textbox. For this i have used a web service. When I run the code on local host everything runs fine. But when i upload the code online ajax autocomplete extender does not invoke web service method. Below is the code.

.aspx Page

<asp:ScriptManager ID="mgr" runat="Server">
      <Services>
        <asp:ServiceReference Path="~/AutoComplete.asmx" />
      </Services>
    </asp:ScriptManager>

AutoComplete Extender:

<asp:TextBox ID="txtKeyword1" runat="server" CssClass="search-field"></asp:TextBox>
    <ajaxToolkit:AutoCompleteExtender
        runat="server"
        BehaviorID="autoComplete1"
        ID="autoComplete1"
        TargetControlID="txtKeyword1"
        ServicePath="~/AutoComplete.asmx"
        ServiceMethod="GetCompletionList2"
        MinimumPrefixLength="1"
        CompletionInterval="1000"
        EnableCaching="true"
        CompletionSetCount="10"
        CompletionListCssClass="autocomplete_completionListElement"
        CompletionListItemCssClass="autocomplete_listItem"
        CompletionListHighlightedItemCssClass="autocomplete_highlightedListItem"
        DelimiterCharacters=";, :"  OnClientPopulating="ShowProcessImage"
        OnClientPopulated="HideProcessImage">
    </ajaxToolkit:AutoCompleteExtender>

Web Service


using System;
using System.Collections;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.UI;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using System.Data;
using System.Data.OleDb;
using System.Collections.Generic;
using System.Web.Script.Services;
using System.Xml;


///

/// Summary description for AutoComplete
///

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

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

[WebMethod]
public string HelloWorld()
{
return "Hello";
}

[WebMethod]
public string[] GetCompletionList2(string prefixText, int count)
{

//ADO.Net
OleDbConnection cn = new OleDbConnection();
DataSet ds = new DataSet();
DataTable dt = new DataTable();

//String strCn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\\F\\Hella\\Force One\\Code\\Force One 14 May 2014\\HellaWarranty.mdb;";
String strCn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\Websites\\HellaWarranty\\HellaWarranty.mdb;";
cn.ConnectionString = strCn;
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = cn;
cmd.CommandType = CommandType.Text;
//Compare String From Textbox(prefixText) AND String From Column in DataBase(CompanyName)
//If String from DataBase is equal to String from TextBox(prefixText) then add it to return ItemList
//-----I Defined a parameter instead of passing value directly to prevent sql injection--------//
cmd.CommandText = "SELECT * FROM CaseMaster where CaseCode like '" + prefixText + "%'";
//cmd.Parameters.AddWithValue("@Name", prefixText);


try
{
cn.Open();
cmd.ExecuteNonQuery();
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
da.Fill(ds);

}
catch
{

}
finally
{
cn.Close();
}
dt = ds.Tables[0];

//Then return List of string(txtItems) as result

List<string> txtItems = new List<string>();
String dbValues;
foreach (DataRow row in dt.Rows)
{
//String From DataBase(dbValues)
dbValues = row["CaseCode"].ToString();
dbValues = dbValues.ToLower();
txtItems.Add(dbValues);
}
return txtItems.ToArray();

}


}



Can Anyone Help me with this.