带有WSDL的PHP​​ SOAP - 内部错误

I need to create a Soap Client on a server with WSDL.

Making a call, the answer is:

<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"> 
<env:Body> 
<env:Fault> 
<faultcode> env: Client </ faultcode> 
<faultstring> Internal Error </ faultstring> 
</ env: Fault> 
</ env: Body> 
</ env: Envelope> 

The error occurs immediately after the statement:

'$client = new soapclient("https://demservicetest.sanita.finanze.it/DemRicettaServiceAnagServicesWeb/services/demServiceAnag"); '

I tried using the soap Php library NuSOAP and Curl, but I always get the same result.

I tested the service with soapUI and it works perfectly.

Regarding my local server, I Xampp vers. 1.7.3, Apache 2.2.14 and PHP 5.3.1. On php.ini I have openssl active and soap.

I have done many tests suggested in various forums and I have not solved yet. I hope someone can help me.

Thanks