odata sevice consume to excel

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ASP.NET

i wrote below code like this
public class WcfDataService1 : DataService<durgaentities>
{

#region This method is called only once to initialize service-wide policies.
public static void InitializeService(DataServiceConfiguration config)
{
try
{
config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);//to read entity data table
config.SetEntitySetPageSize("*", 25);

//config.SetServiceOperationAccessRule("GetEmployeeList",
// ServiceOperationRights.All);//to call getemployeelist method
config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V3;

//config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V3;
}
catch (Exception ex)
{
throw ex;
}
finally
{
}
}
#endregion


after i consumed this service as an excel power query and i entered my service url then i am getting my table but not contain any data
i was getting Excel2013 Error like this "we couldn't get data from the DataModel and errror mesage u got like this "The remote server returned an error" please help me i tried so many ways so many days but still i am not getting solution