OVH.com is a french hosting provider.

If you do not have .ovhconfig file into the root directory of your server, create it with this content:

.ovhconfig

app.engine=php
app.engine.version=5.5
http.firewall=none
environment=production

Read the ovh documentation for more explanations.

Add these lines to your .htaccess to the root of you wiki install:

.htaccess

SetEnv PHP_VER 5_TEST
SetEnv MAGIC_QUOTES 0