I have acquired a used 82698 3 truck shay with factory DCC and Sound. The bell, whistle, lights all work fine and it even makes the chuff sounds when the throttle is moved either forward or reverse, and the brakes squeal then decelerated. The sound/light features work with either my DC or DCC ( NCE Power cab ) but the Loco shows no movement or intent to move. Any ideas/help are greatly appreciated.