LAZER CUT SCUPLFUN S9 won't does not respond HELP

I just bought my lazer machine sculpfun s9 90 w , and i was testing it yesterday everything was fine and i turned if off , i tried to bring and imported model dxf to lightburn when i click on the frame to start the lazer machine doesn’t work at all , it’s turned on and everything but it doesn’t move at all … i have an architecture model to do for tomorrow i m in a real deep problem if it doesn’t work

Make sure you selected the correct COM port.