Just for your info.
This may or may not be a BUG. I tried to hook a sharp IR and a Maxbotix Ultrasound sensors to the EZB 3. Every single time I did that it stopped and had an exception error when I selected the name. I got them somewhat working by just using it as an analog port and not the sharp or Maxbotix. I upgraded to the latest version of ARC and it did the same thing.