Description:
------------
Hello,

There seems to be many unsolved occurances of the following bug when trying to establish a SOAP connection to a .NET endpoint:

Server was unable to process request. ---> Object reference not set to an instance of an object.

I am yet to find a solution - the same application works fine when connected to from a .net platform.

Reproduce code:
---------------
<?php

ini_set('display_errors', 1);
ini_set("soap.wsdl_cache_enabled", 0);

$params = new stdClass;
$params->POS->Source = (object)array('ISOCountry' => 'GB', 'ISOCurrency' => 'GBP');
$params->POS->Source->BookingChannel->CompanyName = (object)array('CompanyShortName' => 'Testing');
$params->AvailRequestSegments->UTSv_AvailRequestSegment->StayDateRange->StartDateWindow = (object)array('EarliestDate' => '2008-04-01');
$params->AvailRequestSegments->UTSv_AvailRequestSegment->StayDateRange->EndDateWindow = (object)array('EarliestDate' => '2008-04-02');
$params->AvailRequestSegments->UTSv_AvailRequestSegment->ConsumerCandidates->ConsumerCandidate->ConsumerCounts->ConsumerCount = (object)array('AgeQualifyingCode' => 'Adult', 'Count' => 2);
$params->AvailRequestSegments->UTSv_AvailRequestSegment->TPA_Extensions->SearchCriteria = (object)array('IndustryClassification' => 1);

try {

	$client = new SoapClient(
		"http://www.testing123.com/AvailabilityService.asmx?WSDL",
		array('trace' => true)
	);

	$client->SearchSupplierProductTypeAvailability($params);

    echo $client->__getLastRequestHeaders() . "\r" . $client->__getLastRequest() . "\r\r" . $client->__getLastResponse();;
	
}
catch (Exception $e) {

    echo "Error!<br />";
    echo $e -> getMessage ();
	
}

?>