I am trying to program the SAM3X externally using the Arduino IDE on a Windows7 system. When uploading I get the error "No device found on COM3". I have: connected a USB cable from the external computer to the Udoo serial port removed the J18 jumper connected the Udoo power cable installed the Arduino IDE 1.5.6-r2 replaced the bossac.exe under ...arduino/hardware/tools installed the CP210x usb to serial converter (and this shows up in my device manager under COM3) in the Arduino IDE I have: selected Arduino Due (programming port) as the board selected COM3 as the port verified the code (it is an example) Now, when I try to upload there is no device found. I am not sure what else I am missing. Any suggestions???