apppointment.fetch/PHP

I've gotten fetch to work for tasks, accounts, etc... but can't seem to
get appointments.fetch to work;  I'm curious if I'm encoding the dates
wrong, or making some other stupid mistake.

A simple example -
#!/usr/bin/php -c /home/awilliam/workspace/pogi
<?PHP
  require_once("XML/RPC.php");
  $client   = new XML_RPC_Client('/RPC2',
                                 'kohocton',
                                 80);
  $client->setCredentials('adam', '*******');
  $fSpec['qualifier']['startDate'] 
    = new XML_RPC_Value(
            XML_RPC_iso8601_encode(mktime(0, 0, 0, 12, 31, 2003)), 
            'dateTime.iso8601');
  $fSpec['qualifier']['endDate'] 
    = new XML_RPC_Value(
            XML_RPC_iso8601_encode(mktime(0, 0, 0, 12, 31, 2004)), 
            'dateTime.iso8601');
  $params = new XML_RPC_Value($fSpec, 'struct');
  $message = new XML_RPC_Message('appointment.fetch', $params);
  $response = $client->send($message);
  print_r($response);
?>
- returns -
xml_rpc_response Object
(
    [xv] => xml_rpc_value Object
        (
            [me] => Array
                (
                    [array] => Array
                        (
                        )
 
                )
 
            [mytype] => 2
        )
 
    [fn] =>
    [fs] =>
    [hdrs] => Array
        (
            [0] => T
        )
 
)
 - empty.


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