Do I need to upgrade my version of CodeIgniter?

[eluser]Bob Puzld[/eluser]
Next controller file… main.php

<?php

class Main extends Controller {
function Main() {
parent::Controller();

$this->load->model('district_model','mdlDistrict');
$this->load->model('user_model','mdlUser');
}

function index() {
$data = array('page_title'=>'Returnable Redemption Reward Program',
'left_col'=>$this->load->view('main/login',0,true),
'right_col'=>$this->load->view('main/index',0,true));

$this->load->view('index', $data);
}

function signup() {
$query = $this->mdlDistrict->GetAll();
foreach($query->result() as $row)
$districts[$row->id] = $row->name;

$data2['districts'] = $districts;

$data = array('page_title'=>'RRR Sign-Up',
'left_col'=>$this->load->view('main/signup_sidebar',0,true),
'right_col'=>$this->load->view('main/signup',$data2,true));

$this->load->view('index', $data);
}

function signup_process() {
// validate input
$rules = array('district_id'=>'required',
'fname'=>'required|alpha',
'lname'=>'required|alpha',
'street'=>'required|numeric',
'address'=>'required',
'city'=>'required',
'zip'=>'required|numeric',
'email'=>'required|valid_email',
'username'=>'required',
'password'=>'required');

$fields = array('district_id'=>'school district',
'fname'=>'first name',
'lname'=>'last name',
'email'=>'e-mail address');

$this->validation->set_rules($rules);
$this->validation->set_fields($fields);

// check for errors
if($this->validation->run() == FALSE) { // if there were errors...
$this->signup();
}
else {
$this->mdlUser->AddUser();

$this->load->library('email');

$this->email->from('rrrprogram@yahoo.com','RRR Program');
$this->email->to($_POST['email'],$_POST['fname'].' '.$_POST['lname']);

$this->email->subject('Welcome to the RRR Program');
$this->email->message("Thank you for signing-up for the RRR Program. You will receive your pick-up day in another e-mail shortly.\n\nRRR Program");
$this->email->send();

redirect('main/index');
}
}

function account_status() {
$data2 = $this->mdlUser->GetAccountStatus($this->session->userdata('USER_ID'));

$data = array('page_title'=>'Account Status',
'left_col'=>$this->load->view('nav',$data2,true),
'right_col'=>$this->load->view('users/view',$data2,true));

$this->load->view('index', $data);
}

function test() {
echo mktime(12,0,0,5,9,2006);
}
}

?>