Ok, my son and I have just completed soldering and testing our new Renard16 board. We installed Vixen 2.1. We have a USB to serial port connector. The computer recognizes it as COM port 4. So it appears drivers are installed correctly, software is installed, and we followed all the videos. However, Vixen isn't connecting to the board. Please help. I've searched all the posts and can't seem to find a solution.