Description:
------------
Hello,
I'm not so skilled with SOAP but I need to use it for a specific request and I'm 
in trouble with a SOAP call to an existing WSDL.

The web service provider has recently changed its environment from PHP to 
ASP.NET and from SOAP 1.1 to SOAP 1.2. Since then I can't use the service I 
need, and I'm getting this Error fetching HTTP heders.

I'm pretty sure that's my client error because another user (they said), that 
uses .NET client, is going well.

I found in many sites and forums that can be a bug in versions below 5.2.6 but, 
as I said, I'm using >5.3 version.

How can I fix it?

Thanks in advance!

Test script:
---------------
<?php
    ini_set("soap.wsdl_cache_enabled","0");
    $cli=new SoapClient("http://www.infonetsrl.it/Dev/infonetwcf/WsRapportiService.svc?wsdl",array("soap_version"=>SOAP_1_2,"trace"=>1));

    $auth=array("user"=>"xxx","password"=>"xxx");
    $params=array(
        "CF"=>"xxx",
        "Report"=>"PGA",
        "ExportHTML"=>"true"
    );

    try{
        $content=$cli->RichiestaNuovoRapporto(array_merge($auth,$params));
    }catch(Exception $e){
        $debug='<h2>Exception</h2><pre>'.htmlspecialchars($e, ENT_QUOTES).'</pre>';
        $debug .='<h2>getLastRequest</h2><pre>'.htmlspecialchars($cli->__getLastRequest(), ENT_QUOTES).'</pre>';
        $debug .='<h2>getLastResponse</h2><pre>'.htmlspecialchars($cli->__getLastResponse(), ENT_QUOTES).'</pre>';
    }

    echo $debug;
?>

The WSDL file is found here: http://www.infonetsrl.it/Dev/infonetwcf/WsRapportiService.svc?wsdl

Actual result:
--------------
***Exception***
SoapFault exception: [HTTP] Error Fetching http headers in C:\Program 
Files\xampp\htdocs\spotter\classes\SOAP_functions.php:160
Stack trace:
#0 [internal function]: SoapClient->__doRequest('<?xml version="...', 
'http://www.info...', 'http://tempuri....', 2, 0)
#1 [internal function]: SoapClient->__call('RichiestaNuovoR...', Array)
#2 C:\Program Files\xampp\htdocs\spotter\classes\SOAP_functions.php(160): 
SoapClient->RichiestaNuovoRapporto(Array)
#3 C:\Program Files\xampp\htdocs\spotter\transactioner.php(202): SOAP_functions-
>buyDocument(Object(MySQL_functions), Object(Generic_functions), Array, '1', 
'1_nsordyll_shoe...', 0, Array)
#4 {main}

***getLastRequest***
<?xml version="1.0" encoding="UTF-8"?>
<env:Envelope xmlns:env="http://www.w3.org/2003/05/soap-envelope" 
xmlns:ns1="http://tempuri.org/"><env:Body><ns1:RichiestaNuovoRapporto>
<ns1:password>WSRAPPORTI</ns1:password></ns1:RichiestaNuovoRapporto></env:Body>
</env:Envelope>

***getLastResponse***