form validation help PLEASE

[eluser]dadamssg[/eluser]
im pretty sure that part is right...this is also in the user guide which is what i was referencing when i wrote it

$this->form_validation->set_rules('username',username','trim|required|min_length[5]|max_length[12]|xss_clean');
$this->form_validation->set_rules('password', 'Password', 'trim|required|matches[passconf]|md5');
$this->form_validation->set_rules('passconf', 'Password Confirmation', 'trim|required');
$this->form_validation->set_rules('email', 'Email', 'trim|required|valid_email');