Forbidden error on /download

Greetings,

I have a problem with a fresh install of OCS on debian jessie.
I have a forbidden error with https://my_ocs_server/download/ (same with http).
I checked /etc/apache2/conf-enabled/ocsinventory-reports.conf and i got this :

Alias /download /var/lib/ocsinventory-reports/download
        <Directory /var/lib/ocsinventory-reports/download>
        Order deny,allow
        Allow from all
        Options Indexes FollowSymLinks
        AllowOverride Options
        </Directory>

On the server, www-data is owner of /var/lib/ocsinventory-reports/download/ with chmod 755.

Any hints ?
Thanks dudes.