CI SOAP Server Problem

[eluser]abbasmn[/eluser]
this is my client:

Code:

<?php
/*
* Created on Oct 19, 2009
*
* To change the template for this generated file go to
* Window - Preferences - PHPeclipse - PHP - Code Templates
*/

if (!defined('BASEPATH')) exit('No direct script access allowed');
class Ws_client extends Controller
{
        function __construct()
        {
        session_start();
        parent::Controller();
                
        }
        
public function client_send_data()
{
    try{
    ini_set( 'soap.wsdl_cache_ttl' , 0 );
    $client = new SoapClient("http://localhost/Hello.wsdl",
    array('soap_version' => SOAP_1_2,'trace' => 1 ));

   echo("\nDumping client object functions:\n");
   var_dump($client->__getFunctions());

   $return = $client->__soapCall("hello",array("world"));
   echo("\nReturning value of __soapCall() call: ".$return);
    

  
      $return = $client->hello("World");
   echo("\nReturning value: ".$return);

      
  
   echo("\nDumping request headers:\n"
      .$client->__getLastRequestHeaders());

   echo("\nDumping request:\n".$client->__getLastRequest());

   echo("\nDumping response headers:\n"
      .$client->__getLastResponseHeaders());

   echo("\nDumping response:\n".$client->__getLastResponse());


}
catch (SoapFault $exception)
    {
    echo $exception;      
  }
}
}

?>