Sidebar disappears for single posts

When I am viewing a single post, my sidebar is gone. When I view the same post through categories – the sidebar is there. Obviously its a conditional tag but I cant work it out. Can someone notice whats going on with my sidebar code

<div id=”sidebar”>

<?php /* Widgetized sidebar, if you have the plugin installed. */
if ( !function_exists(‘dynamic_sidebar’) || !dynamic_sidebar() ) : ?>
<!–
• <?php //include (TEMPLATEPATH . ‘/searchform.php’); ?>

–>

<!– Author information is disabled per default. Uncomment and fill in your details if you want to use it.

• <h2>Author</h2>
  <p>A little something about you, the author. Nothing lengthy, just an overview.</p>

–>

<?php if ( is_404() || is_single() || is_month() ||
is_year() || is_search() || is_paged() || is_front_page() || is_archive() || is_category() || is_page_template() || is_page() ) {
?>

• <?php /* If this is a 404 page */ if (is_404()) { ?>
  <?php /* If this is a category archive */ } elseif (is_category()) { ?>
  <p><?php single_cat_title(”); ?> category.</p>

  <?php /* If this is a yearly archive */ } elseif (is_day()) { ?>
  <p>You are currently browsing the /”><?php echo bloginfo(‘name’); ?> blog archives
  for the day <?php the_time(‘l, F jS, Y’); ?>.</p>

  <?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
  <p>You are currently browsing the /”><?php echo bloginfo(‘name’); ?> blog archives
  for <?php the_time(‘F, Y’); ?>.</p>

  <?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
  <p>You are currently browsing the /”><?php echo bloginfo(‘name’); ?> blog archives
  for the year <?php the_time(‘Y’); ?>.</p>

  <?php /* If this is a monthly archive */ } elseif (is_search()) { ?>
  <p>You have searched the /”><?php echo bloginfo(‘name’); ?> blog archives
  for ‘<?php the_search_query(); ?>’. If you are unable to find anything in these search results, you can try one of these links.</p>

  <?php /* If this is a monthly archive */ } elseif (isset($_GET[‘paged’]) && !empty($_GET[‘paged’])) { ?>
  <p>You are currently browsing the /”><?php echo bloginfo(‘name’); ?> blog archives.</p>

  <?php } ?>

<?php }?>

<?php wp_list_pages(‘title_li=<h2>Pages</h2>’ ); ?>

• <h2>Archives</h2>

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

<?php wp_list_categories(‘show_count=1&title_li=<h2>Categories</h2>’); ?>

<?php /* If this is the frontpage */ if ( is_home() || is_page() || is_category() || is_archive() || is_post() ) { ?>
<?php wp_list_bookmarks(); ?>
<?php } ?>

<?php endif; ?>

</div>