Conditional Header problem

I am trying to show a unique header for Page ID=8. I amended the page.php to start thus:

<?php if ( is_page(8) ) {
    get_header( 'home' );
}  else {
    get_header();
}
include get_template_directory()."/includes/tt_meta.php";
 global $this_post_id; $this_post_id = $post->ID;top_widget_print('in');
if ( theme_get_meta_option($post->ID, 'theme_show_home_widget') &&

and I created an additional theme with the new header, copied its header.php, renamed it header-home.php and copied this file to the main theme (so there is now a header.php and a header-home.php within the Theme).

I do not understand why I cannot see the changed header on the Home page (ID=8).