cattle car cattle pen problem

cattle corral works when turned on with contactor. cattle car works when hooked to independent power. Cannot get cattle car to work on track with corral. ony the corral runs, not the car. Need help!

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Depending on the height of your track, the contact on the bottom of the car may not be touching the short power rail that is built into the part of the platform that goes under the track. Lionel made interchangeable power rails for O and O27 track.