Phpbb3 installation en live

Bonjour,

Je suis entrain d'installer phpbb3 sur mon site et je suis bloquer sur l'etape paramettre avancer quant je clique sur etape suivante voici ce que je recois comme message

[phpBB Debug] PHP Notice: in file /install/install_install.php on line 1199: file_get_contents(schemas/schema_data.sql) [function.file-get-contents]: failed to open stream: No such file or directory
[phpBB Debug] PHP Notice: in file /install/index.php on line 444: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3493)
[phpBB Debug] PHP Notice: in file /install/index.php on line 445: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3493)
[phpBB Debug] PHP Notice: in file /install/index.php on line 446: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3493)
[phpBB Debug] PHP Notice: in file /install/index.php on line 447: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3493)

Aider moi a continuer l'installation s'il vous plait