slideshow not working on home page

Hello,
I have updated to 3.5.1 and my slideshow on the homepage had stopped sliding and buttons not showing on all browsers except IE10.
https://www.mitashah.com/

The theme has been created based on Twenty eleven theme.

The code on front-page.php is :

get_header(); ?>

		<?php /* Start the Loop */ ?>
		<?php while ( have_posts() ) : the_post(); ?>
		<div class="intro">
			<div class="welcome">
				<h1><?php the_title() ?></h1>
				<?php the_content() ?>
			</div>

			<div id="featured">
				<div class="slideshow">

<ul>
						<?php load_featured_content(); ?>
					</ul>
				</div>
				<div class="slider-nav">
					<div id="slidecount"></div>
				</div>
			</div>
		</div>
		<?php endwhile; ?>
		<div class="highlights">
			<?php get_sidebar('home'); ?>
		</div>
<?php get_footer(); ?>

Please help.

Many thanks