Ok, no problem now It's not nLite, it's me ... I burned on a DVD-RW (for tests) but my DVD burner is slave and my DVD "player" is master. So on boot menu I always chose my dvd "player"(because my dvd burner is not in the boot list), but it cannot read DVD-RW, so I alternate them and now it's works !!! Thanks a lot for your help Alexis