Free

Bonjour,
J'ai créé un forum free et il n'y avait qu'un seul thème
J'ai essayé dans ajouter un avec Golive mais après l'avoir installé sur le forum ces Warning

"Warning: Cannot modify header information - headers already sent by (output started at /mnt/167/sda/5/9/next.games/forums/index.php:2) in /mnt/167/sda/5/9/next.games/forums/includes/sessions.php on line 255

Warning: Cannot modify header information - headers already sent by (output started at /mnt/167/sda/5/9/next.games/forums/index.php:2) in /mnt/167/sda/5/9/next.games/forums/includes/sessions.php on line 256

Warning: Cannot modify header information - headers already sent by (output started at /mnt/167/sda/5/9/next.games/forums/index.php:2) in /mnt/167/sda/5/9/next.games/forums/includes/page_header.php on line 484

Warning: Cannot modify header information - headers already sent by (output started at /mnt/167/sda/5/9/next.games/forums/index.php:2) in /mnt/167/sda/5/9/next.games/forums/includes/page_header.php on line 486

Warning: Cannot modify header information - headers already sent by (output started at /mnt/167/sda/5/9/next.games/forums/index.php:2) in /mnt/167/sda/5/9/next.games/forums/includes/page_header.php on line 487"

s'affichent au dessus du forum et quand on se connecte au forum, la page est blanche avec juste les Warnings d'affichés
Comment faire pour régler ce problème ? =(