I am trying to run two Parallax HB 25 motor controllers and Parallax Motor Mount and Wheel Kit 28962 with an EZ-B v4 micro-controller. The HB 25 data sheet says that the motor controller needs a standard pwm servo signal to operate. I am using a regulated 7.2 vdc for EZ-B and 12 vdc for motors. When I hook it up to a standard servo it works and when I hook it up to the motor controllers it doesn't. I have tried everything I can think of to get it EZ-Bo work to no avail. Help

Also the Motor Mount and Wheel Kit comes with a encoder to establish position. Can the EZ-B use this information. If yes what do I need to do.