send xml - soap php

I try send simply XML with SOAP in php but with no results..

$wsdl = 'http://ift.tt/XodjwM';
$client = new SoapClient($wsdl, array(
    'login' => $soapUser,
    'password' => $soapPassword
));

$data = '<soapenv:Envelope xmlns:soapenv="http://ift.tt/sVJIaE" xmlns:tem="http://tempuri.org/">
   <soapenv:Header/>
   <soapenv:Body>
      <tem:AKP>
         <tem:NUMER>gfgdf9654</tem:NUMER>
      </tem:AKP>
   </soapenv:Body>
</soapenv:Envelope>';
$re = $client->__call("AKP", array($data));

Can you help me how can I send this XML with client->APK() ? ?