Model does not load

[eluser]boytun[/eluser]
this my model file(mdl_widg_html)

Code:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Mdl_widg_html extends MY_Model {
protected $timestamps=TRUE;
public $table_name='widg_html';
protected $primary_key='id';
protected $primary_filter='intval';
protected $order_by='id desc';
public $rules=array(
  'body'=>array('field'=>'body', 'label'=>'Body', 'rules'=>'trim|required')
  );

public function __construct()
{
  parent::__construct();
    
}


}