Commissioning - cannot talk to Due (2 replies)

Hi,
I am having difficulty in connecting to the due board with both arduino ide and pronterface. Arduino ide recognises ttyACM0 but the serial monitor just remains blank. Tried typing M115 but get Invalid code so time to update firmware as stated in instructions. However after closing arduino ide, when I run the bossac command using I get no device found. I did update SD card with newly downloaded files before trying the bossac command.

sudo /home/alan/arduino-1.5.5/hardware/tools/bossac --port=ttyACM0 -U true -e -w -v RepRapFirmware.bin -R
No device found on ttyACM0

I can rerun arduinoIDE after above and still get Invalid code return on tty/ACM0. So what is going on?

Trying to connect with pronterface I get
Connecting...
then infinite list of

T:19.6 B:22 or approx

Also my router switch does not recognise the due as no light comes on when I plug in a cat cable. Is this a problem with my due?

Thanks, any help appreciated,
Alan