Hi , while checking the walkthrough, i have found that the point 6 is misleading. please check the below link and let me know if it is correct. http://msdn.microsoft.com/en-us/library/ms464040%28v=office.14%29.aspx Delete the Class1.cs or Class1.vb file, and also delete the Service.cs or Service.vb file that remains in the App_Code folder. what i have instead is the app_data folder. Could you please elaborate if this is the correct step? Thanks