wp_print_footer_scripts not loading my action function

Hello,

using 3.3. I have a class and in my __construct() method, I have the add_action (shown below). The function I have added is not getting executed, though. This is for a plugin and this is to do some custom stuff in the admin.

class myclass {
    function __construct() {
        ...

        add_action('wp_print_footer_scripts', array(&$this, 'FeFiction_OverWrite_Post_Edit_Meta_Boxes'),20);
        ...
    }

    function FeFiction_OverWrite_Post_Edit_Meta_Boxes()
    {
        global $post,$wp,$wpdb;
        ...
        do some stuff, print some stuff
        ...
    }
}