this has been here like half a week now lol, but dw i fixed it

anyone??

I installed tha chatbox modification and everything is fine apart from when i click on shoutbox i get this....

Fatal error: Cannot redeclare check_cookie() (previously declared in /home/creative/public_html/include/functions.php:28) in /home/creative/public_html/include/functions.php on line 28

plz help ty