when i go to checkout i get this message.

Warning: Cannot modify header information - headers already sent by (output started at /home/carljo2/public_html/catalog/includes/languages/english.php:355) in /home/carljo2/public_html/catalog/includes/functions/general.php on line 29


when i go to my account i get this message.

Warning: Cannot modify header information - headers already sent by (output started at /home/carljo2/public_html/catalog/includes/languages/english.php:355) in /home/carljo2/public_html/catalog/includes/functions/general.php on line 29


i'm kinda new at this php stuff i would appreciate some help of some kind.
you can see for your self at http://www.below-retail.com


thank you for any help you can give me.