Erreur PNP4Nagios avec Apache

J'avais une configuration fonctionnelle avec PNP4Nagios et Nagios. Tout était parfait.

Vendredi, j'ai installé NagiosQL.

Depuis, l'interface web de PNP4Nagios ne fonctionne plus !

J'obtiens cette erreur lorsque j'essaie d'y accéder :

The requested URL /pnp4nagios/index.php/graph was not found on this server.

Mod_rewrite est activé, mais j'imagine que l'erreur ci-dessus indique qu'il ne fonctionne pas correctement ?

Les liens générés par Nagios (qui fonctionnaient, avant vendredi ) ressemblent à ceci :

http://srv-nagios/pnp4nagios/index.php/graph?host=win-server&srv=PING

Voici la sortie pertinente du programme Apache error.log :

[Fri Mar 02 15:06:43 2012] [error] [client 172.16.0.139] File does not exist: /usr/local/pnp4nagios/share/index.php/graph

Voici mon /etc/apache2/conf.d/pnp4nagios.conf :

Alias /pnp4nagios "/usr/local/pnp4nagios/share"

<Directory "/usr/local/pnp4nagios/share">
    AllowOverride None
    Order allow,deny
    Allow from all
    #
    # Use the same value as defined in nagios.conf
    #
    #AuthName "Nagios Access"
    #AuthType Basic
    #AuthUserFile /usr/local/nagios/etc/htpasswd.users
    Require valid-user
    <IfModule mod_rewrite.c>
            # Turn on URL rewriting
            RewriteEngine On
            Options FollowSymLinks
            # Installation directory
            RewriteBase /pnp4nagios/
            # Protect application and system files from being viewed
            RewriteRule ^(application|modules|system) - [F,L]
            # Allow any files or directories that exist to be displayed directly
            RewriteCond %{REQUEST_FILENAME} !-f
            RewriteCond %{REQUEST_FILENAME} !-d
            # Rewrite all other URLs to index.php/URL
            RewriteRule .* index.php/$0 [PT,L]
    </IfModule>
</Directory>

Et mon /etc/apache2/sites-available/default :

<VirtualHost *:80>
    ServerAdmin webmaster@localhost

    DocumentRoot /usr/local/nagios/share/vshell
    <Directory />
            Options Indexes FollowSymLinks
            AllowOverride None
            Allow from all
            AuthType Kerberos
            AuthName "Nagios Authentification"
            KrbMethodNegotiate On
            KrbMethodK5Passwd On
            KrbAuthRealms 1234.COM
            Krb5KeyTab /etc/1234.keytab
            require user xxx@1234.COM
            require user yyy@1234.COM
            require user aaa@1234.COM
            require user bbb@1234.COM
    </Directory>
    <Directory /var/www/>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride None
            Order allow,deny
            allow from all
    </Directory>
    ScriptAlias /cgi-bin/ /usr/local/nagios/sbin/
    <Directory "/usr/lib/cgi-bin">
            AllowOverride None
            Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
            Order allow,deny
            Allow from all
    </Directory>

    ErrorLog ${APACHE_LOG_DIR}/error.log

    # Possible values include: debug, info, notice, warn, error, crit,
    # alert, emerg.
    LogLevel warn

    CustomLog ${APACHE_LOG_DIR}/access.log combined

Alias /doc/ "/usr/share/doc/"
<Directory "/usr/share/doc/">
    Options Indexes MultiViews FollowSymLinks
    AllowOverride None
    Order deny,allow
    Deny from all
    Allow from 127.0.0.0/255.0.0.0 ::1/128
</Directory>

</VirtualHost>

Je suis vraiment perdue là.