Laser cutter disconnected on lightburn laser panel

I recently purchased a K40 laser cutting and engraving machine 200 x 300mm.
I have installed the lightburn software.
On the laser panel the printer is displayed as disconnected although all cables are connected properly.
My laptop is operating with windows 8.

I see you also posted in LightBurn forum and received some responses there.

For windows 8, did you install the drivers?