HTTP/1.1 200 OK
Server: nginx/1.4.1
Date: Tue, 18 Jun 2013 11:09:43 GMT
Content-Type: text/xml
Content-Length: 207
Connection: keep-alive
Vary: Accept-Encoding

<?xml version="1.0"?><response>
       <item type="error">
               <errorcode>-1</errorcode>
               <message>Did not receive a proper input value from you</message>
       </item>
</response>