I've got a WordPress installation. The issue which i have may be the following:

The house page while offered normaly, content, images, HTML, anything are offered properly the HTTP Status Code is 404. Every other page is offered with normal HTTP Status 200. The only real page that offered with 404 may be the webpage.

Any idea regarding how to solve this problem please ? :?

OK. We reduced the problem.

For whatever reason the mod_secure made this problem. We disabled it simply for check and that we discovered that was the issue !!!

Thanks everyone !