success function not executing on Status Code:200 OK in jquery ajax in post type

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Ajax

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JSON

JSONP

I'm not able to read response of jquery ajax on success full execution of jquery function and on status 200 ok error function is running.
Please help, for reference see below code

<script>
       $(document).ready(function () {
           $('#loadingPanel').hide();
           $('#btnsave').click(function () {

               var Name = $('#txtName').val();
               var Head = $('#txtHead').val();
               var Phone = $('#txtPhone').val();
               var Address = $('#txtAdd').val();
               alert(Name + Phone + Head + Address);
               //alert(data);
               //$('#loadingPanel').show();
               $.ajax({
                   url: "WebService1.asmx/success",
                   type: "POST",
                   dataType: "jsonp",
                   contentType: "application/json; character=utf-8",
                   data: '{"Name": "' + Name + '","Head": "' + Head + '","Phone": "' + Phone + '","Address": "' + Address + '"}',

                   //data: JSON.stringify(Details),
                   success: function (data, status) {
                       alert(data.responseData.results.length + ' results found!');
                   },
                   error: function () {
                       alert('Something goes wrong!');
                   }

               });

           });

       });
   </script>

Remote Address:[::1]:11679
Request URL:http://localhost:11679/WebService1.asmx/success?callback=jQuery11020997845095815137_1433094227735
Request Method:POST
Status Code:200 OK

Respons is

{"d":"25"}