Modbus TCP server

Hi, I am having problem to interface modbus poll (master) with Factory I/O.
My testing now is to turn on/off the light indicators using modbus poll.
Connection between these 2 are established.
I am able to change the coil register but the light indicator connected to coil 16 doesnt respond.

Hi @Yiez,
Can you please send us more details about the problem?
Is the scene in Run mode? Does the light indicator in the scene light up?