Parse Error?!?!

I’ve been trying to build my own theme from scratch and have hit a problem.
I keep getting “Parse Error, Unexpected T_DO in [directory]/comments.php”. and don’t understand why. heres my code, I hope someone can help

<?php // Do not delete these lines
 if (‘comments.php’ == basename($_SERVER[‘SCRIPT_FILENAME’])) die (‘Please do not load this page directly. Thanks!’);
		if (!empty($post->post_password)) { // if there’s a password
			if ($_COOKIE[‘wp-postpass_’ . COOKIEHASH] != $post->post_password) { // and it doesn’t match the cookie
    		?>
    			<p class="nocomments">This post is password protected. Enter the password to view comments.<p>
    			<?php
			    return;
			}
		}
  		/* This variable is for alternating comment background */
  		$oddcomment = ‘alt’;
		?>

		<div id="comments">
			<?php if($comments) : ?>
			<div class="comments_list">
				<ol>
					<?php foreach ($comments as $comment) : ?>
					<li class=”<?php echo $oddcomment; ?>” id=”comment-<?php comment_ID() ?>”>
						<div class="comments_author">
						<?php comment_author_link() ?>
						</div> <!-- close comments_author -->
						<div class="comments_text">
						<?php if ($comment->comment_approved == '0') : ?>
							<em>Your comment is awaiting moderation.</em>
						<?php comment_text() ?>
						</div> <!-- close comments_text -->
					</li>
					<?php /* Changes every other comment to a different class */
					if (‘alt’ == $oddcomment) $oddcomment = ”;
					else $oddcomment = ‘alt_comment’;
					?>

					<?php endforeach; ?>
				</ol>

			</div> <!-- close comments list -->
			<?php else : // this is displayed if there are no comments so far ?>
				<?php if (‘open’ == $post->comment_status) : ?>
  				<!-- If comments are open, but there are no comments. -->
  				<?php else : // comments are closed ?>
  				<!-- If comments are closed. -->
 				<p class="nocomments">Comments are closed.</p>
 				<?php endif; ?>
			<?php endif; ?>
			<?php if (‘open’ == $post->comment_status) : ?>
			<div class="comments_form">
				<form action="<?php echo get_option(’siteurl’); ?>/wp-comments-post.php" method="post" id="commentform">
					<?php if ( $user_ID ) : ?>
						<p>Logged in as <a href="<?php echo get_option(’siteurl’); ?>/wp-admin/profile.php"><?php echo $user_identity; ?></a>. <a href="<?php echo get_option(’siteurl’); ?>/wp-login.php?action=logout" title="Log out of this account">Logout &raquo;</a></p>
					<?php else : ?>
						<p><input type="text" name="author" id="author" value="<?php echo $comment_author; ?>" size="22" tabindex="1" />
						<label for="author"><small>Name <?php if ($req) echo "(required)"; ?></small></label></p>
						<p><input type="text" name="email" id="email" value="<?php echo $comment_author_email; ?>" size="22" tabindex="2" />
						<label for="email"><small>Mail (will not be published) <?php if ($req) echo "(required)"; ?></small></label></p>
						<p><input type="text" name="url" id="url" value="<?php echo $comment_author_url; ?>" size="22" tabindex="3" />
						<label for="url"><small>Website</small></label></p>
					<?php endif; ?>
					<?php smilies_clickable(); ?>
					<p><textarea name="comment" id="comment" cols="50" rows="10" tabindex="4"></textarea></p>
					<p><input name="submit" type="submit" id="submit" tabindex="5" value="Submit Comment" />
					<input type="hidden" name="comment_post_ID" value="<?php echo $id; ?>" /></p>
					<?php do_action(‘comment_form’, $post->ID); ?>
				</form>
				<div class="comment_meta">
				<?php if ($post-> comment_status == "open" && $post->ping_status == "open") { ?>
					<p>
					<a href="<?php trackback_url(display); ?>">Trackback this post</a>  |  <?php comments_rss_link(‘Subscribe to the comments via RSS Feed’); ?>
					</p>
				<?php } elseif ($post-> comment_status == "open") {?>
					<p>
					<?php comments_rss_link(‘Subscribe to the comments via RSS Feed’); ?>
					</p>
					<?php } elseif ($post->ping_status == "open") {?>
					<p>
					<a href="<?php trackback_url(display); ?>">Trackback this post</a>
					</p>
					<?php } ?>
				</div>
				<?php endif; // If registration required and not logged in ?>

			</div> <!-- close comments form -->
			<?php endif; //if you delete this the sky will fall on your head ?>
 		</div> <!-- close comments -->