[toastnbacon]

What are the lights on the speed controllers doing? If it's a solid orange/yellow light, they are reviving a data value of 0. If they're flashing, they aren't getting any data. I would also check the voltage of the power going to the digital sidecar while this happens. Have you eliminated it being a programming problem? That's what really jumps out at me, although just because *I* keep breaking our robot through the computer doesn't mean everyone does...