Aide phpbb (erreur code)

Sallut,

esque que vous pourriez me corrigez ce code s'il vous plait merci (cela affiche une erreur voir + bas quand j'envoi un MP sous PHPBB)

erreur :


Warning: Wrong parameter count for usort() in /home/fulltuning/web/www/forums/privmsg.php on line 1188

Warning: Cannot modify header information - headers already sent by (output started at /home/fulltuning/web/www/forums/privmsg.php:1188) in /home/fulltuning/web/www/forums/includes/page_header.php on line 555

Warning: Cannot modify header information - headers already sent by (output started at /home/fulltuning/web/www/forums/privmsg.php:1188) in /home/fulltuning/web/www/forums/includes/page_header.php on line 557

Warning: Cannot modify header information - headers already sent by (output started at /home/fulltuning/web/www/forums/privmsg.php:1188) in /home/fulltuning/web/www/forums/includes/page_header.php on line 558

les ligne de code incriminés :

Les ligne de code (pris au plus large au cas où)

<? // Work around for "current" Apache 2 + PHP module which seems to not

// cope with private cache control setting

if (!empty($HTTP_SERVER_VARS['SERVER_SOFTWARE']) && strstr($HTTP_SERVER_VARS['SERVER_SOFTWARE'], 'Apache/2'))

{

	header ('Cache-Control: no-cache, pre-check=0, post-check=0');

}

else

{

	header ('Cache-Control: private, pre-check=0, post-check=0, max-age=0');

}

header ('Expires: 0');

header ('Pragma: no-cache');

 
//-- mod : split topic type ------------------------------------------------------------------------

//-- add

// split global announce ?>

merci @ + ;-)