For security reasons, it is better to hide server information, don't you agree with this?
For anyone interested, I finally found the solution in Kloxo MR, we need to add:
ServerSignature Off
ServerTokens Prod
in /etc/httpd/conf/httpd.conf
and then restart apache
Thanks :-)
For your information: I don't know why but in your forum website, I often have an Internal Error 500 when I tried to access your site (I use Google Chrome), I need to refresh several times to load a page.