Added code to sidebar but Widgets don’t work

Installed WP 2.5.1
My theme wasn’t widgetized, so i made the recommended changes.
Do i still need to add some code to function.php in the new WP version?
If so, where exactly and what exactly? I tried most of what i could and read about 3 times but i still can’t get it to work.

My sidebar markup looks like this now:

</div>
<div id=”sidebar”>

<?php
if ( function_exists(‘register_sidebar’) )
register_sidebar();
?>

<?php wp_list_categories(‘title_li=<h2>Categories</h2>’); ?>

• <h2>Archives</h2>

<?php wp_get_archives(‘type=monthly&limit=6’); ?>

• <h2>Meta</h2>

<?php wp_register(); ?>
• <?php wp_loginout(); ?>
• WordPress

<?php wp_meta(); ?>

<?php endif; ?>

</div>