Thank you Mike for your reply
I use port com1 For both the old and new Computers
all Settings Correct And used a new cable
softwear use inkscape and signcut
i tested on more than a computer, but the problem still
need your help
have Chinese desktop cutting plotter that work well two months ago and stopped using them
But now, when run with the softwear are not running and all settings are good and used with anothera computer , but also not working