Error Type in Restful Service: {"error": {"code": "", "message": {"lang": "en-US", "value": "Forbidden"}}}

NOTE: Hi friends, this post related to .Net.

Here my function for update user using OData Service:

function UpdateUser(userId) {

             var updateUserdata = { UserId: 'test', FirstName: 'Accepted', LastName: 'Rejected' };

             var requestURI = USERS_ODATA_SVC + "(" + userId + ")";

             var requestOptions = {

                 requestUri: requestURI,

                 method: "PUT",

                 data: updateUserdata

             };

             OData.request(requestOptions);

         }

Am getting response error like this:

{"error": {"code": "", "message": {"lang": "en-US", "value": "Forbidden"}}}

I spent nearly 5 hours and find out the Cause for this error 

 public static void InitializeService(DataServiceConfiguration config)

        {

config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);     -> here initially i gave like this, but it should be "EntitySetRights.All "

             config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);

        }

 this is the cause for 403 - Forbidden error in ADO.Net datasevice.