Welleman K8072 DMX Relay Troubles

I have little hurry with my question.

I have few K8072 relays to use in theater but now I have a huge problem with dmx signal.

Error Led indicates that there appears DMX signal, but nothing will hapen. I have setup address to match with desk with DIP switches. I have used two different Lighting Desk, Stairville 6CH desk and Avab Pronto!. Both act same… When there is DMX signal Relay is ON and will not respond at selected address. If i control first 100 DMX channels at same time relay will wake up but wont turn OFF…

Error led also indicates that CPU is working when power is switched on.

What should i do?