adding new page

i read posts regarding how to create additional page under More Information box. Follow up the instructions. But when I click on the new link it displays the main page content instead of content of the page I created.
index.php?main_page=translation
and there is a file translation.php in includes/extra_datafiles with all defines;
define('FILENAME_DEFINE_TRANSLATION', 'define_translation');
define('FILENAME_TRANSLATION', 'translation');
define('BOX_INFORMATION_TRANSLATION', 'Document Translation');

and includes/modules/sideboxes/classic/more_information.php
contains

$more_information[] = '<a href="' . zen_href_link(FILENAME_TRANSLATION) . '">' . BOX_INFORMATION_TRANSLATION . '</a>';

and there is includes /languages/english/html_includes/classic/define_translation.php file that contains hmtl I'd like to display.

What am I doing wrong?
Thank you,
Inna

Scrap the more information alterations you have made first. Create this new page & links with ezpages. It will take care of the things that you are having problems with without the alteration of the core code.