Warning: reset() [function.reset]: Passed variable is not an array or object in /home/keithe/public_html/zencart/includes/modules/order_total/ot_tax.php on line 38

Warning: Variable passed to each() is not an array or object in /home/keithe/public_html/zencart/includes/modules/order_total/ot_tax.php on line 39

Warning: Cannot modify header information - headers already sent by (output started at /home/keithe/public_html/zencart/includes/modules/order_total/ot_tax.php:38) in /home/keithe/public_html/zencart/includes/functions/functions_general.php on line 44

everytime i try to finish a purchase with paypal i recieve this after hitting PAY NOW. any ideas?