Cannot switch pal to ntsc on my dvr KPD679ZB-E

[romelito 0]

My Dvr doesnt allow me to switch pal to ntsc. There is no option for switching the pal/nstc. There is only the auto detect option which does not work even when connected to a ntsc camera. How do I allow it do be detected as ntsc or change it manually. My DVR is KPD679ZB-E.