HAVING PROBLEMS WITH CONNECTIONS WITH A BACHN MAKER D8-4050p

I am having problems with the above. When I insert what I want to laser and hit start, the program becomes busy for some reason. I have written to Bachin and they helped me to get it semi-started, but I do not know where to go from here.
The controller I am using is a GRBL 1.1F and I do have connections

please I need a little help on what to do.

Thanks

A post was merged into an existing topic: Laser always says busy