WP Header and Footer on vBulltin forum

[s.wolder]

Hi,

I have bought a PDF instruction on how to integrate vBulletin into a WP theme, so the vB forum is shown within the same header and footer as the rest of the site. The instructions are bought from obscureclouddon including 7 days of e-mail support, but so far I received no response on my support requests. So now I hope that someone here, would be kind enough to help me find a solution for a problem I ran into.

I'm a rookie in php, wp and vBulltin, so I hope you have some patience

The idea with the theme integration is, that a plugin in vBulletin calls a header and a footer file (copies of the original theme header and footer, that can be modified as wished).

But now I get the following error:

Fatal error: Call to undefined function do_action() in /var/www/gourmetbar.dk/public_html/wp-content/themes/twentyeleven/footer2.php on line 27.

My footer2 file looks like this. I've commented out two lines that first gave me an error (the lines starting with "//x"). I've also deleted closing body and header tags in the end of the file (instructed in the instructions):

<?php
/**
 * Template for displaying the footer
 *
 * Contains the closing of the id=main div and all content after
 *
 * @package WordPress
 * @subpackage Twenty_Eleven
 * @since Twenty Eleven 1.0
 */
?>

	</div><!-- #main -->

	<footer id="colophon" role="contentinfo">

			<?php
				/*
				 * A sidebar in the footer? Yep. You can can customize
				 * your footer with three columns of widgets.
				 */
//x				if ( ! is_404() )
//x					get_sidebar( 'footer' );
			?>

			<div id="site-generator">
				<?php do_action( 'twentyeleven_credits' ); ?>
				<a href="<?php echo esc_url( __( 'http://wordpress.org/', 'twentyeleven' ) ); ?>" title="<?php esc_attr_e( 'Semantic Personal Publishing Platform', 'twentyeleven' ); ?>"><?php printf( __( 'Proudly powered by %s', 'twentyeleven' ), 'WordPress' ); ?></a>
			</div>
	</footer><!-- #colophon -->
</div><!-- #page -->

<?php wp_footer(); ?>

I really hope that someone can help.