single.php isn't working right

I think my single page is jacked up I’m testing a theme I made to change my site and when I click the posts link to go to the single post nothing shows and it looks like it the title says page not found

<?php get_header(); ?>

		<div id="content">
				<?php query_posts($query_string . '&cat=-3'); ?>
				<?php if(have_posts()):?>
					<?php while(have_posts()):the_post();?>
		<!-- loop starts// contains the loop-->
			<div class="date-info">
				<div class="date"><?php the_time('d'); ?></div>
				<div class="day"><?php the_time('M'); ?></div>

			</div>

			<div class="post-info">
				<div class="post-title">
					<h2 class="post-title"><a href="<?php the_permalink();?>"title="<?php the_title();?>"><?php the_title();?></a></h2>
				</div>

				<div class="post-meta">
					Posted By <?php the_author();?> / In <?php the_category(',')?> / With <?php comments_popup_link('No Comments','1 Comments','% Comments');?>
				</div>

				<div class="post">
					<?php the_content();?>
						<?wp_link_pages();?>
							<?php edit_post_link('Edit','<p>','</p>');?>
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								<h3>Please bookmark and share</h3>
									<ul>
										<li><a href=”https://stumbleupon.com/submit?url=<?php the_permalink(); ?>&title=<?php the_title(); ?>”><img src="/wp-content/themes/templafied/images/stumbleupon.png" alt="stumble" /></a></li>
										<li><a href="https://digg.com/submit?phase=2&url= <?php the_permalink();?>&title=<?php the_title();?>"><img src="/wp-content/themes/templafied/images/digg.png" alt="digg" /></a></li>
										<li><a href="https://del.icio.us/post?v=4&noui&jump=close&url=<?php the_permalink();?>&title=<?php the_title();?>"><img src="/wp-content/themes/templafied/images/delicious.png" alt="delicious" /></a>

									</ul>
				</div>		

			</div>
		<!--Loop Ends -->
		<?php endwhile;?>
			<?php endif;?>
	</div>

		<?php get_sidebar(); ?>	

		<?php get_footer(); ?>

is something wrong with my single.php file?