danlupu2012 on "[Plugin: WooCommerce - excelling eCommerce] Fatal error: Class 'WooCommerce_Widget_Cart_Kriesi' not found in /home/regiun92/"

Hi,
I installed theme forest theme -replete and then
WooCommerce - eCommerce Shop plugin.
And I have this error Fatal error: Class 'WooCommerce_Widget_Cart_Kriesi' not found in /home/regiun92/public_html/deliafashion.ro/wp-includes/widgets.php on line 324.
What can I do?
Thank You

http://wordpress.org/extend/plugins/woocommerce/