Tvheadend

I don't know why it will not work. I've managed before on a synology, but can't seem to manage the same setup on a QNAP nas.

What I have done:
- under TV Adapters enabled all 4 HDHomerun tuners and assigned them to networks 'Rekam'
- under Networks I added a network 'Rekam' and took over the exact same settings as on the Synology. (enabled, network name: Rekam, create bouquet enabled, network ID 4683, new muxes + changed muxes)

What I expect to happen after that is that muxes will come in, but it doesn't. Does anyone know where to look now?