This is probably a question for Innovation First. Did you calibrate the speed controllers? If so did you get a confirmation that the calibration was accepted. See
http://www.innovationfirst.com/FIRST...sersManual.pdf for procedure.
I would next ask if the speed controllers react the same if the robot controller is not powered up when you apply power to the controllers. I was under the impression that the RC was supposed to disable or set to zero all PWM outputs while initializing. If the controllers are normal with no power to the RC, you might have a problem with the RC