Kodi doesn’t connect with THE

It’s sure that Tvheadend works because when I choose ‘play” in a channel the browser downloads a m3u that played with VLC let me see the live of that channel.

So Tvheadend has of a list of channels but in the kodi frontend (actually openelec on Raspberry) I selected tvheadend as PVR (defined in the add-on as PVR client) but even if I enabled the TV in the system setup section, the TV menu doesn’t show up.

Anybody can help me to figure out what the problem is?

Thanks