Forum Linux.debian/ubuntu Erreur PerlRequire

bonjour,
J'installe une application sur mon serveur (OCS
inventory NG) et j'ai une petite erreur avec Perl
lorsque je relance APache :

Forcing reload of web server: Apache2 ... failed!
You may still have some apache2 processes running. There are
processes named 'apache2' which do not match your pid file,
and in the name of safety, we've left them alone. Please review
the situation by hand.
Syntax error on line 2 of /var/www/ocsinventory-NG/apache_config:
Invalid command 'PerlRequire', perhaps mis-spelled or defined by a module not included in the server configuration
qu'est ce que je dois faire merci