ethernet connection failing when cutting

Hi there,

I bought a 750x1000 recently,(duet 2, W06623), saw it working before purchase, set it up on my laptop, I can manipulate all of the movements from the laptop, but when I attempt to send a file to cut, it comes up with "lost connection, trying to reconnect", tried a different ethernet cable, and I've tried removing the SD card out and cleaned it (although it was clean), any ideas please?