hi guys i have a zen shop running - www.aquadeeziac.com

must say awesome, i am just having a bit of hassle at the mo, if i add a new catergorie i get this message when my customers try and view it

Warning: Cannot modify header information - headers already sent by (output started at /home/camnet/public_html/shop/includes/languages/english/index.php:117) in /home/camnet/public_html/shop/includes/functions/functions_general.php on line 44
i dont know why or how to fix

if you would like to try it is under my livestock header then live sand

many thanks in advance for your help!!