I wanted to add an extra option to the Information Sidebox, didn't want to use the More Information sidebox to try and keep number of sideboxes to a minimum.

Anyway I added the code in information.php copying another for example:

$information[] = '<a href="' . zen_href_link(FILENAME_SIZES) . '">' . BOX_INFORMATION_SIZES . '</a>'

then in english.php added:

define('BOX_INFORMATION_SIZES', 'Mug Sizes');

then in filenames.php added:

define('FILENAME_SIZES', 'sizes');

Then I created a sizes.php file in languges/english

The option show's fine in the sidebox however when I click it I get page not found it goes to index.php?main_page=sizes which is how all the others work so I'm stumped. Do I need to add something in the database?