My father retired from CNC work about a year ago. About two months ago, I re-opened his workshop. There is this CNC mill from Extron: Extron E320. It has a MIRL Milling 2000 control. There is a bit of communication problem in the system making it hard to transfer files to it. There is Rs232 port and a network card. I had a floppy fitted to the USB emulator and is clearly showing the USB stick in DOS. Despite doing so well, it has failed to communicate through the control program. Any help from you guys? What could be the problem?