contact Web service of a vCenter

Hello,

I'm not sure, it the good location for my post..

anyway, I'm begining using webService to interact with my esx 4.1.

This one is under a vCenter.

I'm interacting through php script with soap client.

Here is my code :

<?php
$serverIP = "XXX";
$serverUser = "XXX";
$serverPassword = "XXX";
$client = new SoapClient("https://$serverIP/sdk/vimService.wsdl", array("trace" => 1, "location" => "https://$serverIP/sdk/") );
$soapmsg["_this"] = array( "_" => "ServiceInstance", "type" => "ServiceInstance");
$result = $client->RetrieveServiceContent($soapmsg);
$ServiceContent = $result->returnval;
$soapmsg = NULL;
$soapmsg["_this"] = $ServiceContent->sessionManager;
$soapmsg["userName"] = $serverUser;
$soapmsg["password"] = $serverPassword;
$result = $client->Login($soapmsg);
$UserSession = $result->returnval;
echo "User " . $UserSession->userName . " is connected\n";$soapmsg = NULL;
$soapmsg["_this"] = $ServiceContent->sessionManager;
$result = $client->Logout($soapmsg);
?>

It work well directly on my esx, but when I try to login to the WS of my vCenter, (replacing the credentials) I've got the following error:

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Fatal error: Uncaught SoapFault exception: [WSDL] SOAP-ERROR: Parsing Schema: can't import schema from 'https://192.168.10.12/sdk/reflect-messagetypes.xsd' in /root/VMwarePHPWebServices/vmwareTestAPI.php:10
Stack trace:
#0 /root/VMwarePHPWebServices/vmwareTestAPI.php(10): SoapClient->SoapClient('https://192.168...', Array)
#1 {main}
  thrown in /root/VMwarePHPWebServices/vmwareTestAPI.php on line 10

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I looked on the web and other people faced this problems, it seems to be the fault of the WSDL file syntax?

http://www.devraju.com/programming/fatal-error-uncaught-soapfault-exception-wsdl-soap-error-parsing-schema-cant-import-schema-from-httpschemas-xmlsoap-orgsoapencoding/

I wondered if this problem is knowed, I am on the good track, do someone have a solution?

Or maybe it's not the same way to contact the vCenter?

Thanks in advance!