$data is undefined - example followed from video tutorial

[eluser]deco10[/eluser]
So I suppose I must have done something in terms of configuration to cause this because it doesn't any sense otherwise.

$data is undefined when I go to the prod page. index.php/prod
The home page loads just fine.

this is in my prod_view.php file (in views, obviously)

Code:

<title><?=$data['title']?></title>

this is my controller:

Code:

class Home extends Controller {

    function Home()
    {
        parent::Controller();
    $this->load->helper('url');
    $this->load->helper('html');    
    }
    
    function prod()
    {
        $data['title'] = "Auto - Product Line";

        $this->load->view('prod_view', $data);
    }
    
    
    function index()
    {
        $data['title'] = "Auto - Home";
        $this->load->view('home_view', $data);
    }
}