went live - links not working anymore - please help

[eluser]theprodigy[/eluser]
I'm not exactly sure it's a htaccess issue, because I can't even get it to work with index.php in the url. (http://www.eglisedieuvivant.org/index.ph...mmentaires does not work)
if htaccess was the issue, using index.php should work, but it's not.