I am having trouble getting my new motor controller to work. I have tried two boards, and my battery seems to be working fine because the blue light comes on. However, when I run the example code, nothing happens. I have installed and reinstalled the libraries and followed all of the directions. I have triple-checked all of the connections, and everything suggests that it should be working fine. However, I checked the motor output with a voltmeter while it was supposed to be on. It read 0.00. Please help!