Widget problem for popular posts with thumbnails

Hello, I am trying to make a new widget that will display popular posts (by comments) with a thumbnails, but it is not working. I have searched the forums but to no avail. Here is the code:

$result = $wpdb->get_results("SELECT comment_count,id,post_title FROM $wpdb->posts ORDER BY comment_count DESC LIMIT 0 , 5");
				foreach ($result as $post) {
				setup_postdata($post);
				$postid = $post->id;
				$title2 = $post->post_title;
				$commentcount = $post->comment_count;
				$titlelim = substr($title2,0,30);
				if ($commentcount != 0) { 

				echo '<div class="poppostcom">';
				echo '<li>';

				$image = get_post_meta($post->id, 'bigphoto', true); /* Replace lead_image with the name of the custom field for the image you want to use */
				echo '<div class="popimgs">';
				echo '<img alt="" src="https://localhost/wordpress/wp-content/themes/norwegiangrunge/timthumb/timthumb.php?src='.$image.'&h=30&w=30&zc=1" />';
				echo '</div>';
				echo '<p><a href="'.get_permalink('.$postid.').'" title="'.$title.'">';
				if (strlen($title2) > 50 ) { echo ''.$titlelim.' &hellip;';
				 } else { echo ''.$title2.''; }

				echo '</a>'; echo'{';
				echo ''.$commentcount.''; echo'}'; echo '&nbsp; </p>';						

				echo '</li>';
				echo '</div>';

				 } } ;

It does not display anything. Any ideas? Your help is greatly appreciated.