Description:
------------
SOAP result is null (wsdl file is correct and WebService works).
The following pice of code explain the problem:

Reproduce code:
---------------
$wsdl = new SoapClient('http://wsrp.netunitysoftware.com/WSRPTestService/WSRPTestService.asmx?Operation=WSDL',array('trace' => 1));

$RegistrationData =
  array("consumerName" => "test",
        "consumerAgent" => "test.1.0",
        "methodGetSupported" => false,        
        "consumerModes" => array('wsrp:view','wsrp:edit'),  
        "consumerWindowStates" => array('wsrp:view','wsrp:edit'),
        "consumerUserScopes" => array(),
        "customUserProfileData" => array(),
        "registrationProperties" => array(),
        "extensions" => array());

print_r($wsdl->register($RegistrationData_Type));



Expected result:
----------------
SOAP RESULT:

<?xml version="1.0" encoding="utf-8"?><soap:Envelope
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<registerResponse xmlns="urn:oasis:names:tc:wsrp:v1:types">
 <registrationHandle>1f9c4223-ce73-4cdf-b24f-fdd15d2066ad</registrationHandle> 
 </registerResponse>
 </soap:Body>
</soap:Envelope>

print:
Array
(
    [registrationHandle] => 1f9c4223-ce73-4cdf-b24f-fdd15d2066ad
)

Actual result:
--------------
SOAP RESULT:
the same as bottom

print:
NULL