Thread:Project:Support desk/New Setup

I'm new to setting up Mediawiki. I'm wanting to install the InputBox extension so I have available on page quick access to create a page vs doing search then create new. I have been following this url: http://www.mediawiki.org/wiki/Extension:InputBox

When I put the require_once "$IP/extensions/InputBox/InputBox.php";   at the bottom of the LocalSettings.php file the Mediawiki will not display, I remove and it does so I'm doing something wrong.

Can you plz advise?