Scaffolding problem on local machine

[eluser]Unknown[/eluser]
Hi,
I am new to codeigniter and am trying to follow the blog video. When I get to the part where you load scaffolding and then create entries, I get an error:

Code:

Not Found

The requested URL /CodeIgniter/index.php/blog/scaffolding/add was not found on this server.

when I try to add an entry. I thought scaffolding was supposed to create the add page for me. If not, how can I create it manually? thanks.

By the way, I am using PHP 5.2.6 and MySql 5.0.51b on my local machine.