help with XMLRPC

[eluser]Unknown[/eluser]
Hello everybody, I'm creating a class-XMLRPC server to communicate with a client is apparently all right, my client sends the request to the API (web service) then he loads the library, send the run method and the model carries a one to query the database, but when I send data from the server back to the client, it always brings me an error this one:


The XML data received was either invalid or not in the correct form for XML-RPC. Turn on debugging to examine the XML data further.

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Following is the code of the classes below:

Client

Code:

public function authNew($data){
  
       $this->CI->load->library('xmlrpc');
        $this->CI->config->load('chefao',TRUE,TRUE);
        $server_url = $this->CI->config->item("server_url","chefao");
      
        $this->CI->xmlrpc->server($server_url, "80");
              
        $this->CI->xmlrpc->method('user.insert');
    
//        $this->CI->xmlrpc->set_debug(true);
        $this->CI->xmlrpc->timeout(60);
        $time = time();

        $request = array(
            array(
                array(
                    'id_status'    => $data['id_status_fk'],
                    'id_pessoa'    => $data['id_pessoa_fk'],
                    'email'        => $data['email'],
                    'senha'        => $data['senha'],
                ), "struct"
            )
        );
        

        $this->CI->xmlrpc->request($request);

        if (!$this->CI->xmlrpc->send_request()) {
            echo $this->CI->xmlrpc->display_error();
        } else {
            echo '<pre>';
            print_r($this->CI->xmlrpc->display_response());
            echo '</pre>';
        }
    }

API:

Code:

class Api extends CI_Controller {
    
    public function __construct() {
        parent::__construct();
        $this->load->library('xmlrpc');
        $this->load->library('xmlrpcs');
    }

    function index() {
//        $this->load->library('xmlrpc');
//        $this->load->library('xmlrpcs');
        $this->load->library('authentication/Authentication');
//        $this->load->library('people/People');
//        $this->load->library('customer/Customer');


        $config['functions']['authentication.insert'] = array('function' => 'authentication.save');
        $config['functions']['authentication.update'] = array('function' => 'authentication.update');
        $config['functions']['authentication.delete'] = array('function' => 'authentication.delete');
//        $config['functions']['customer.insert']       = array('function' => 'authentication.save');
//        $config['functions']['customer.delete']       = array('function' => 'authentication.delete');
//        $config['functions']['people.insert']         = array('function' => 'people.save');
        $config['functions']['auth.getAll']           = array('function' => 'authentication.listAuth');
        
        $config['object']                             = $this;
                                                                                                                                                                                                                
        $this->xmlrpcs->initialize($config);
        $this->xmlrpcs->serve();
    }

}

Library:

Code:

public function listAuth(XML_RPC_Message $request){
      
        $ci =& get_instance();
        $ci->load->model("autenticacao_model", 'user');
        $ci->user = new autenticacao_model();

        $parameters = $request->output_parameters();
        $res = $ci->user->listAll();        
        if($res == NULL){
            echo $this->CI->xmlrpc->display_error();
        } else{
            $authListar = array();
            
             foreach ($res as $user){
                $authListar[$user["id_autenticacao"]] =
                    array(
                        array(
                            array(



                                'id_autenticacao'       =>  array($user['id_autenticacao'],     'int'),
                                'id_status_fk'          =>  array($user['id_status_fk'],        'int'),
                                'id_pessoa_fk'          =>  array($user['id_pessoa_fk'],        'int'),
                                'email'                 =>  array($user['email'],               'string'),
                                'senha'                 =>  array($user['senha'],               'string'),
                                'ultimo_acesso'         =>  array($user['ultimo_acesso'],       'string'),
                                'status'                =>  array($user['status'],              'string'),
                             ),'struct'
                           ),
                        );                      
             }

             $response = array($authListar, 'array');
             print_r($response);die;

        }

        return $ci->xmlrpc->send_response($response);


    }

My model:

Code:

public function listAll() {
        $this->db->select("auth.*, auth_status.nome_status as status")
                 ->from("autenticacoes auth")
                 ->join("autenticacoes_status as auth_status","auth_status.id_status = auth.id_status_fk")
                 ->join("pessoas as p", "p.id = auth.id_pessoa_fk");
        $res = $this->db->get();
        if($res->num_rows() == 0 ){          
            return NULL;
        }
        else{
            $res = $res->result_array();
        }
          return $res;
    }