Tvheadend htsp client ‘access denied’

Hello,

i work on this now for the second day and i really need some help:

My Hardware:
Mobo: MSI H81M-E34 – Socket 1150 mATX Board 4Gb ram
CPU: Intel Celeron G1840 2×2,8Ghz
1x SSD 60Gb – Systemdisc
1x HDD 2,5″ 500Gb
DVB-S card: Technotrend Budget S2-4200Twin Tuner

Software:
Libreelec 8.01
Kodi 17.1

ok TVheadend is running i got around 1.500 services
But now whenever i want to go to liveTV i get the message: ‘Acces denied”
Is there any solution to this?

Thanx in advance

Ciao hjanko