Newbie and CodeIgniter Examples

Good afternoon everyone.  I am in the process of building a new website for my company and I am now working with CI in order to have a solid framework that will allow me to keep my site secure.  It'll be a subscription site, but I plan to use a payment company's API to process my subscriptions as I want nothing to do with payments or the certifications it requires.

So, in reading about security I found that most recommendations was to use a framework to build your site, which most have built-in security for secure sites.  I looked at CakePHP and I couldn't get it to work nicely on my system, which then led me down the road to Zend.  While installing Zend using a tutorial for MAMP and OSX, the author recommended a more lightweight framework for newbies to the M-V-C world, which is me.  So, I decided to look at CI and I was impressed with how easy I was able to get it up and running on my system.  Minimal headaches!

I have been working my way through the tutorials and completed the tutorial on the news site and am now working my way through the General Topics and have run into a problem.  The controller example had me create a controller named blog.php.  I copied the code from the example and pasted it into my editor (TextWrangler) and then saved the file to my application/controllers folder.  For clarity my site is http://localhost:8888/codeigniter/.  I am getting a 404 page not found error when I go to http://localhost:8888/codeigniter/index.php/blog/.  The strange thing is that http://localhost:8888/codeigniter/index.php/news/ works fine.  The permissions and ownership are identical on both blog.php and news.php in the controllers folder.

Can anyone elaborate as to why I get this error with blog.php and not news.php?

The example codes is:

Code:

<?php
    class Blog extends CI_Controller {

        public function index() {
            echo 'Hello World!';
        } // Index
    } // Blog
?>

The one difference in this example that I noticed is the closing "?>" at the bottom of this controller whereas the other examples do not contain this.  I tried removing it and the results do not change. The apache log does not show any errors either.

Thank you for any help.

Tom