[Alan Anderson]

Are there any messages on the Diagnostic tab of the Driver Station?

What is the Robot Signal Light doing? Describe its pattern of blinks.

Does the Dashboard show you what the joysticks are doing? Does it show what is being commanded to the drive motors?

Go back to the previous working program if possible, just to make sure it still works. That will help rule out a hardware problem and let you know to focus on your code changes.