Beginners tutorial - Fatal Error. MY_MODEL Not found in system core common.php

[eluser]Unknown[/eluser]
Evening all,

I'm a newbie trying to get my head into CI. Following what should be the most basic of tutorials http://ellislab.com/codeigniter/user-gui...ction.html.

Thought I'd followed it to the letter, but when I try to do the last step and actually view [baseurl]index.php/news I get nasty fatal error

Code:

( ! ) Fatal error: Class 'MY_Model' not found in C:\wamp\www\SandBox\system\core\Common.php on line 174

Anyone point me where to look?

Thanks,
Gareth