title: Data inserted successful but jquery still returning error
body: <p>I used following jQuery to insert data via Data Service.
  Event though I got status-response 201 and the data is successfully inserted into my database, the system still regard it as an error and gives me "failed" alert?</p>
  
  <p>What am I missing here?</p>
  
  <pre><code>$.ajax({
      type: "POST",
      url: "http://localhost:49223/Form/WebDataService.svc/XMLForm(guid'1eaef3a0-d6df-45bf-a8f6-3e7292c0d77e')/XMLRecord/",
      data: JSON.stringify(record),
      contentType: "application/json; charset=utf-8",
      dataType: "json",
      success: function() {
          alert("Success");
      },
      error: function(xhr) {
          alert("fail");
      }
  });
  </code></pre>
  
  <p><strong>UPDATE:</strong></p>
  
  <p>Debug Message from Fire Bug:</p>
  
  <pre class="lang-none prettyprint-override"><code>Preferences
  
  POST http://localhost:49223/Form/WebDataService.svc/X...ef3a0-d6df-45bf-a8f6-3e7292c0d77e%27)/XMLRecord/
  
  POST http://localhost:49223/Form/WebDataService.svc/XMLForm(guid%271eaef3a0-d6df-45bf-a8f6-3e7292c0d77e%27)/XMLRecord/
  
  jquery....min.js (line 127)
  POST http://localhost:49223/Form/WebDataService.svc/X...ef3a0-d6df-45bf-a8f6-3e7292c0d77e%27)/XMLRecord/
  
  POST http://localhost:49223/Form/WebDataService.svc/XMLForm(guid%271eaef3a0-d6df-45bf-a8f6-3e7292c0d77e%27)/XMLRecord/
  
  201 Created 6.7s
  
  POST http://localhost:49223/Form/WebDataService.svc/X...ef3a0-d6df-45bf-a8f6-3e7292c0d77e%27)/XMLRecord/
  
  POST http://localhost:49223/Form/WebDataService.svc/XMLForm(guid%271eaef3a0-d6df-45bf-a8f6-3e7292c0d77e%27)/XMLRecord/
  
  201 Created
  
  
  get readyState 4
  
  get responseText "{ "d" : {\r\n"__metadata"...\')/XMLForm"\r\n}\r\n}\r\n} }"
  
  get responseXML null
  
  get status 201
  
  get statusText "Created"
  </code></pre>