appointment.fetch

i have some appointment on my ogo db. i can see it via web.
i tried to read those appointments by a xmlrpc call via http.
i produced this request:
<?xml version="1.0" encoding="UTF-8"?>
   <methodCall>
      <methodName>appointment.fetch</methodName>
      <params>
         <param>
            <value>
               <struct>
                  <member>
                     <name>startDate</name>
                     <value>
                        <dateTime.iso8601>2000-01-17 11:00  GMT</dateTime.iso8601>
                     </value>
                  </member>
                  <member>
                     <name>endDate</name>
                     <value>
                        <dateTime.iso8601>2010-09-17 11:00 GMT</dateTime.iso8601>
                     </value>
                  </member>
               </struct>
            </value>
         </param>
      </params>
   </methodCall>
 
but i have as a response an enpty data array.... (no exception is thrown)
there is some logical/syntax error?
 
thank you

				
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