Issue regarding theme or plugin??

I am using whitelight commerce theme for my site with woocommerce ..and on my home page i m getting this error.. I m not gettin this error is of theme or plugin ..Bcoz i am also finding few errors in internal pages.Like on single product page i m not able to c the summary tab..
Fatal error: Class ‘woocommerce_product’ not found in
whitelight-commerce/includes/homepage-shop-panel.php

Following is my home-shop-panel.php

<?php
/**
 * Homepage Features Panel
 */

	/**
 	* The Variables
 	*
 	* Setup default variables, overriding them if the "Theme Options" have been saved.
 	*/

	global $woocommerce;

	$settings = array(
					'thumb_w' => 100,
					'thumb_h' => 100,
					'thumb_align' => 'alignleft',
					'shop_area' => 'false',
					'shop_area_entries' => 3,
					'shop_area_title' => '',
					'shop_area_message' => '',
					'shop_area_link_text' => 'View all our products',
					);

	$settings = woo_get_dynamic_values( $settings );

?>
			<section id="shop-home" class="home-section fix">

    			<header class="block">
    				<h1><?php echo stripslashes($settings['shop_area_title'] ); ?></h1>
    				<p><?php echo stripslashes($settings['shop_area_message'] ); ?></p>
    				<a class="more" href="<?php echo get_post_type_archive_link('product'); ?>" title="<?php _e( 'View all our products', 'woothemes' ); ?>"><?php echo $settings['shop_area_link_text']; ?></a>
    			</header>

    			<ul class="recent products">

					<?php
					$number_of_products = $settings['shop_area_entries'];
					$args = array( 'post_type' => 'product', 'posts_per_page' => $number_of_products );
					$first_or_last = 'first';
					$loop = new WP_Query( $args );
					$count = 0;
					while ( $loop->have_posts() ) : $loop->the_post(); $_product = &new woocommerce_product( $loop->post->ID ); $count++; ?>

						<li class="product <?php if ( $count % 3 == 0 ) { echo 'last'; } ?>">

							<a href="<?php echo get_permalink( $loop->post->ID ) ?>" title="<?php echo esc_attr($loop->post->post_title ? $loop->post->post_title : $loop->post->ID); ?>">

								<div class="img-wrap">

									<?php woocommerce_show_product_sale_flash( $post, $_product ); ?>

									<?php if (has_post_thumbnail( $loop->post->ID )) echo get_the_post_thumbnail($loop->post->ID, 'shop_thumbnail'); else echo '<img src="'.$woocommerce->plugin_url().'/assets/images/placeholder.png" alt="Placeholder" width="'.$woocommerce->get_image_size('shop_catalog_image_width').'px" height="'.$woocommerce->get_image_size('shop_catalog_image_height').'px" />'; ?>

								</div>

							</a>

							<h3><a href="<?php echo get_permalink( $loop->post->ID ) ?>" title="<?php echo esc_attr($loop->post->post_title ? $loop->post->post_title : $loop->post->ID); ?>"><?php the_title(); ?></a></h3>
								<?php the_excerpt(); ?>
							<span class="price"><?php echo $_product->get_price_html(); ?></span>
								<?php woocommerce_template_loop_add_to_cart( $loop->post, $_product ); ?>
							<div class="fix"></div>

						</li>

						<?php if ( $count % 3 == 0 ) { echo '<li class="fix clear"></li>'; } ?>
					<?php endwhile; ?>

				</ul><!--/ul.recent-->

    		</section>

    		<?php wp_reset_query(); ?>

Versions
WC – 2.0.9