In osCMax, the footer.php file is no longer used for anything.
The page that controls the html for the footer is main_page.tpl.php in the directory of the template you are using.
For example:
To change the actual text in the footer, edit the language file
The variables you want to change are as follows:
// footer text in includes/footer.php
define('FOOTER_TEXT_REQUESTS_SINCE', 'requests since');
define('FOOTER_TEXT_BODY', 'Copyright © 2005 <a href="http://oscdox.com">osCDox</a>, <a href="http://aabox.com">AABox Web Hosting</a>,<br> Powered by <a href="http://aabox.com/ms2-max.html" target="_blank">osCMax 2.0.3</a>');