How did you do it on front-page? I reckon code like this (taken direct from kakumei’s front-page) should work everwhere but I haven’t tried it – if you already have, sorry.
<?php if ( bb_forums() ) : ?>
<h2><?php _e('Forums'); ?></h2>
<table id="forumlist">
<tr>
<th><?php _e('Main Theme'); ?></th>
<th><?php _e('Topics'); ?></th>
<th><?php _e('Posts'); ?></th>
</tr>
<?php while ( bb_forum() ) : ?>
<tr<?php bb_forum_class(); ?>>
<td><?php bb_forum_pad( '<div class="nest">' ); ?><a href="<?php forum_link(); ?>"><?php forum_name(); ?></a><small><?php forum_description(); ?></small><?php bb_forum_pad( '</div>' ); ?></td>
<td class="num"><?php forum_topics(); ?></td>
<td class="num"><?php forum_posts(); ?></td>
</tr>
<?php endwhile; ?>
</table>
<?php endif; // bb_forums() ?>
If it doesn’t work, chuck <?php bb_forums(); ?>
somewhere before it and try again.
You’ll need to dig into the the index.php file in the root of the code (not a template file). All the prep to retrieve the forums from the database is done there.