MY_Model Base CRUD Model

[eluser]megabyte[/eluser]
I'm getting this error using MY_Model

Call to undefined method MY_Model::MY_Model() on line 18

which is

parent::__construct();

Here's my code

Code:

class Countries_model extends MY_Model
{

    function __construct()
    {
        parent::__construct();
        $this->table = 'countries';
    }

    
    /**
     * Get Countries
     *
     * @param    int
     * @return    array
     */
    function get_all_countries($limit, $offset)
    {
        $this->db->select("*, DATE_FORMAT(created, '%b. %d,%Y') as created", FALSE);
        $this->limit($limit, $offset);
        return $this->get_all();
    }
    
    
    /**
     * Count Countries
     *
     * @param    int
     * @return    array
     */
    function count_all_countries()
    {
        return $this->count_all();
    }
    
}