Re: My installation does not launch …
I use a similar setup with the root folder of my domain as wordpress, then a subfolder for bbpress. So I have:
In my WordPress Control panel under options, both URLs are set to http://www.domain.com with no trailing slash. I noticed in your config this URL has a trailing slash:
$bb->wp_home = 'http://www.subventions.fr/';
Maybe that is causing a problem?