Plama Firing wont turn off


I am having an odd issue. While I’m in the mach3 software and press f5 to manually fire the plasma it works as it should, but when I press f5 again to shut it off, it wont shut off. I also get a message on my computer saying that my usb device is not recognized. I’m able to jog with no issues so I know that it does communicate, at least to some degree. Has anyone experienced this issue before?