Re: Pedal won't work on battery?
First, does it work with a power adapter? Second, make sure the wires are properly connected to the battery clip, and to the board. If anything's loose that could be the culprit, in which case it wouldn't be too tough to fix, you'd just need to open up the pedal and resolder the connections, maybe with a new battery clip.
Beyond that I'm not sure what else the problem might be, but good luck.