[StealthMentor]

Reading the OP's problem I would guess that it is more likley the module is not connected into the cRIO well, a bent pin on his roung cable, or it is just not getting inserted all the way. We had an odd problem where the screw holding the cRIO on was loose, causing the module to lose connectivity intermittentley when we would hit bumps or change direction, boy was the robot acting wierd.