Fatal error: Call to a member function get() on a non-object in

[eluser]Jason McCallister[/eluser]
I am running through the video tutorial for CI and ran into this problem:

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Blog::$db

Filename: controllers/blog.php

Line Number: 14


Fatal error: Call to a member function get() on a non-object in /Applications/xampp/xamppfiles/htdocs/xampp/codeignitor/system/application/controllers/blog.php on line 14

Here is the blog.php controller; for some reason it hates get. Any ideas?

Code:

<?php

class Blog extends Controller {
    
    function Blog()
        {
            parent::Controller();
    
        }
    function index()
        {
            $data['title'] = "My First CodeIgniter Site";
            $data['heading'] = "Heading Goes Here";
            $data['entry'] = $this->db->get('entries');
            
            $this->load->view('blog_view', $data);
        }
    
}

?>