Hi guys, we are students about to fail our engineering class and would greatly appreciate any assistance. We are using Lego RCX motors, wired up to the Ardumoto Motor Shield (https://www.sparkfun.com/products/9815) . We are using the code found here (http://paste.ubuntu.com/9699063/) and when we open serial monitor and type in 8 (to move forward) only one motor moves forward and the other doesn't do anything. When we reverse it by typing in 2, both motors work. Many of the groups in our class are having the same problem with the same setup, however a few groups have gotten it to work with the same setup. We wired the same configuration up to an Arduino Uno and both motors work as intended. We have tried changing the motors/wires/motorshield/udoo but to no avail. Any assistance would be welcome. Thank you.