Two more restarts and it's working now:
[email protected]:~# szap-s2 -c channels.conf -H -p -r -S 0 "TheVoice" -a1 reading channels from file 'channels.conf' zapping to 1 'TheVoice': delivery DVB-S, modulation QPSK sat 0, frequency 12524 MHz H, symbolrate 30000000, coderate auto, rolloff 0.35 v...