Open ET, and click "utilities", then "comm adapter 3 tool kit". Click "application firmware flash", then "select file". The bottom file in the list is the most current (1.23.54). Click on that file, then click "open" and "begin". All the comm adapter lights will flash in sequence while the software is installing. After it's complete, click "utilities" in the tool kit and click "usb power off". This disables the USB power to the comm adapter, which causes communication problems.