xfce4-screensaver does not work with xdg-screensaver

xfce4-screensaver-command 0.1.10

xdg-screensaver lock works with xscreensaver, light-locker and gnome-screensaver, for example, but not with xfce4-screensaver, Other xdg-screensaver commands do not work with xfce4-screensaver either.