PEAR SOAP as client

[pierre@web-lance.com (PHPDiscuss - PHP Newsgroups and mailing lists)]

Hi all,
i've some problems using soap as client 
this is my code 
require_once 'SOAP/Client.php';
$wsdl_url = 'http://www.anevset.com/ws/WS_Reg0.XML';
$WSDL     = new SOAP_WSDL($wsdl_url); 
$client   = $WSDL->getProxy(); 
$params   = array(
   'Key' => 'wl5sil04'
   'Action' => '200',
   'Param' => '');
$res = $client->ws_show($params);
And i have this error : 
soap_fault Object
(
    [error_message_prefix] => 
    [mode] => 1
    [level] => 1024
    [code] => SOAP-ENV:Server
    [message] => Le nom de la WDL contenant le service doit être précisé
dans l'espace de nommage.

NameSpace must contain the WDL name
    [userinfo] => 
    [backtrace] => Array

This is my first time with soap, i've tried many thing without success.
Thx to all for any informations please.
cheers 
Pierre

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