The Server Method " " Failed

[ibraheem abulubbad]

Dear Expert,

Please i used ComboBox with services ,in my local machine its work fine also when i publish it to IIS7 .

now when i put the site one the server and access it the services not working and give me The Server Method " " Failed.

Please Help

Best Regards 
Ab Abulubbad
My code IS :

<tel:RadComboBox ID="rcbFileNo" runat="server" Skin="Web20" Width="80px" AutoPostBack="True"
                        AllowCustomText="True" MarkFirstMatch="True" EnableLoadOnDemand="True" EnableItemCaching="True"
                        ShowMoreResultsBox="True" OnClientItemsRequesting="OnClientItemsRequesting" EmptyMessage="رقم الملف"
                        OnSelectedIndexChanged="rcbFileNo_SelectedIndexChanged" meta:resourcekey="rcbFileNoResource1">
                        <WebServiceSettings Method="SearchFileNo" Path="~/Services/asmx/Search.asmx" />
                    </tel:RadComboBox>
                    <asp:ObjectDataSource ID="odsGetFileNosList" runat="server" SelectMethod="GetFileNosList"
                        TypeName="SMASIP.DataAccess.DBA.SMASServicesOldDB.LookupsServices"></asp:ObjectDataSource>

using System.Collections;
using System.Web.Services;
using System.Data.SqlClient;
using SMASIP.WebApplication.Base;
using SMASIP.DataAccess.DAL;
using Telerik.Web.UI;
using System.Web.Script.Services;

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

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


    [WebMethod(EnableSession = true)]
    public IEnumerable SearchFileNo(RadComboBoxContext context)
    {
        par = new SqlCommand().Parameters;
        par.AddWithValue("@SearchPar", context.Text);
        par.AddWithValue("@cmd", "GetFileNosList");

        return DataProcess.GetIEnumerableList(Abstract.getDataTable("p_OldSMASIPServicesProcedure", par));
    }
    [WebMethod(EnableSession = true)]
    public IEnumerable SearchClassNo(RadComboBoxContext context)
    {
        par = new SqlCommand().Parameters;
        par.AddWithValue("@SearchPar", context.Text);
        par.AddWithValue("@cmd", "SearchClassNo");

        return DataProcess.GetIEnumerableList(Abstract.getDataTable("p_OldSMASIPServicesProcedure", par));
    }
}

[Dimitar Terziev]

Hi Ibraheem,

Since this scenario had been working before it's been deployed, it seems that this problem is not directly related to RadComboBox itself. There may be different causes for this problem, so in order to troubleshoot it, we would need some more information. In order to check what has gone wrong, my suggestion is to use event logging as described in this article here.

All the best,
Dimitar Terziev
the Telerik team