HELP..Mopar Perfomance ECU No spark

OK, I am at wits end here. I have installed the Mopar performance ECU (the orange box) andI can't get spark. My engine was recently dynoed and the distributor hasn't been touoched since then. When they dynoed it they used there own coil. I have read the instruction numerous time so I am sure I have it hooked up right. I get no spark out of the coil. I have tried the old coil and a new coil (external resisitor type) I read the troubleshooting section and ran a separate wire to ground the ecu box. I have 12.5 volts at the battery and 11.5 volts at the ballast resister. All new plugs and wires and like I said, it ran on the dyno. anybody got any suggestions? I don't know where to go from here. Are those ECU boxes ever bad from the factory. I know you should go there first but I am lost.
thanks