WIll not reverse

I was preparing for a class I am teaching using VexIQ clawbots with sensors. It is an introductory RobotC class. Perhaps I need to go to the Robotc site…In any case, when I reverse the direction–and the right side motor is set up to be reversed to begin with, it does not change direction no matter the sign on the motor power if you are using the RobotC code. It works fine using natural language. Any thoughts or suggestions?

All firmware has been updated to the latest versions.