Custom form validation problem

[eluser]marcoslavorato[/eluser]
Hello friends.

I have a problem with my custom form validation class. With a simple method to validate the fields i got a error for extends the default class.

Error:

Code:

Fatal error: Cannot redeclare class MY_Form_validation in /Users/Sites/testes/system/application/libraries/My_form_validation.php on line 44

Code (Libraries folder):

Code:

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* MY_Validation Class
*
* Extends Validation library
*
* Adds one validation rule, "unique" and accepts a
* parameter, the name of the tabela and coluna that
* you are checking, specified in the forum tabela.coluna
*/
class MY_Form_Validation extends CI_Form_Validation {
    function MY_Form_Validation($config = array()){
        parent::CI_Form_Validation($config);
    }

    function campo_unico ($valor, $campo){
        $CI =& get_instance();
        list($tabela, $coluna) = split("\.", $campo, 2);
        //Seta mensagem de erro
        $CI->form_validation->set_message('campo_unico', '%s já está sendo usado. Tente com outro valor.');
        //Verifica se é único (ou não)
        $query = $CI->db->query("SELECT COUNT(*) as contador FROM $tabela WHERE $coluna = '$valor'");
        $row = $query->row();
        //Retorna
        if ($row->contador == '0'){
            return true;
        }else{
            return false;
        }
    }
}
?>

Controller:

Code:

$this->load->library('form_validation');
$this->load->library('my_form_validation');

[eluser]WanWizard[/eluser]
You don't have to load my_form_validation, CodeIgniter does that automatically.

[eluser]marcoslavorato[/eluser]
Thnaks WanWizard, I will try.