suds.WebFault: Server raised fault: 'Wrong parameters for authorization'

<?php
$client = new SoapClient('https://xx.xx.xx.xx/service/?wsdl');
$headers = array();
$headers[] = new SoapHeader('http://mfisoft.ru/auth','Login','admin');
$headers[] = new SoapHeader('http://mfisoft.ru/auth','Password','admin');
$client->__setSoapHeaders($headers);
$table_hi = $client->getTableByTitle('Blocked numbers');
$row_data = array(
		array(
                          array(
                                  'name' => 'prfx',
                                  'value' => '55555555'
                           ),
                          array(
                                  'name' => 'blocking_time',
                                  'value' => '20140306185014'
                           )
)
);
$rowset=$client->insertRowset($table_hi, $row_data);
?>