Easel only half connected

Weird thing happening now - desk top computer talks fine to x-carve, but I can’t use a CNC in my study (I tried!) so I have invested in a new laptop (I know!). Downloaded arduino… connected x-carve… green CARVE comes up…The step controls work to set up work-piece, etc… But it won’t carve. Nothing happens. Green CARVE turns back to blue as if it has done the job.

Uninstalled arduino, repeated installation, same problem. What have I forgotten?

(Still struggling to get up and running - thanks for your help.)