single.php doesn’t change anything!

I’ve been trying to add a simple php code under my posts (I want a little “permalink” next to “comments”). I know I’m supposed to do that in single.php, but no matter what I do, it doesn’t have any effect on my site at all! How is that possible? I have tried to paste other codes (which are 100% correct and SHOULD work), but still no changes on my site.

Here’s my single.php :

<?php get_header(); ?>

<div id=”content”>

<?php if (have_posts()) : while (have_posts()) : the_post(); ?>

<div class=”post” id=”post-<?php the_ID(); ?>”>
<h2 class=”posttitle”><?php the_title(); ?></h2>
<div class=”postdate”>
<?php $sweetdreams_author = sweetdreams_author(); if ($sweetdreams_author == ‘true’ ) {
the_author(); echo ‘ ‘; _e(‘on’);
} ?>
<?php the_time(get_settings(‘date_format’)); ?> <?php _e(‘at’); ?> <?php the_time(); ?>
<?php if (function_exists(‘time_since’)) { ?>
<span><?php echo time_since(abs(strtotime($post->post_date_gmt . ” GMT”)), time()); ?> <?php _e(‘ago’); ?></span>
<?php } ?>
</div>
<div class=”postbody”>
<?php the_content(__(‘Continue reading’) . “\”” . the_title(”, ”, false) . “\” »”); ?>
<?php wp_link_pages(array(‘before’ => ‘<p>Pages: ‘, ‘after’ => ‘</p>’, ‘next_or_number’ => ‘number’)); ?>
</div>
<div class=”postmeta”>
<?php _e(‘Filed under’); ?> <?php the_category(‘, ‘); ?>
<?php edit_post_link(__(‘Edit’), ‘ | ‘, ”); ?>
</div>
</div>

<?php comments_template(); ?>

<div class=”navigation”>
<div class=”previous”><?php previous_post_link(‘« %link’) ?></div>
<div class=”next”><?php next_post_link(‘%link »’) ?></div>
</div>

<?php endwhile; else: ?>

<div class=”post”>
<h2 class=”posttitle”><?php _e(‘Not Found’); ?></h2>
<div class=”postbody”>
<p><?php _e(‘Sorry, but no posts matched your criteria.’); ?></p>
<?php include (TEMPLATEPATH . “/searchform.php”); ?>
</div>
</div>

<?php endif; ?>

</div>

<?php get_sidebar(); ?>

<?php get_footer(); ?>