First Test Controller

[eluser]Unknown[/eluser]
Very simple question as a starter.

After installation I have two folder [system] and [user-guide] in root. Upon placing blog.php file in applications/controllers/ detailed here: http://ellislab.com/codeigniter/user-gui....html#what

The URL ../index.php/blog/ does not return the test 'hello world' statement. Does the above folder structure reflect a correct CodeIgniter installation?

Thanks

Ross