What theme are you using? Are you using a child theme set up so that your changes are not lost when the theme is updated?
http://codex.wordpress.org/Child_Themes
I don’t think it’s this problem as I have made this theme by myself from scratch.
Get it working thanks to lelandf!
So the file which had to be modified was page.php and the code:
<?php if (is_page('your-page-slug')) { include (TEMPLATEPATH . '/footer2.php'); } else { get_footer(); } ?>
Yey!