GRE 800 CPU Firmware Problem

I am trying to update my CPU firmware from 1.0 version to the1.8 version.



When I press the Menu button on the front of the scanner while connecting the cable to the computer

I keep getting an error message that says.



"could not open scanner port. Error code port does not exist.



Any help will be greatly appreciated.



Thanks,

Tim

GRE 800 CPU Firmware Problem