KODI disable “TVheadend HTSP” PVR

I have TVHeadend working (I can see any TV channel from other PC on my LAN) on my OpenELEC 7. I have the PVR TVheadend enabled and the service too. However, any time I enable TV on settings, KODI begings to search a PVR and do not find any, so finally KODI shows the addons menu, where I can see that PVR Tvheadend addond has been disabled. This happens again and again, even when I restart.

Please, any idea about this problem?

Thank you