Yep I've already tried to start the service "xinetd start" but it didn't work out.
But thanks to your answer I look up the man oh xinetd and I found this option :
-stayalive
Tells xinetd to stay running even if no services are specified
So with "xinetd -stayalive", it works. I See xinetd in my "ps -A" commande
Thanks.
See ya,
Tuan.