We purchased a Bachmann Overland Limited set for Christmas. The train worked fine for several days (forward and reverse) but yesterday it started to stop after going about a foot in the reverse direction. The train light is still on, but something seems to be binding the engine in reverse. Does anyone have any ideas as to what the problem could be? We are very careful about how the train is handled.

The train can be brought back to the forward direction without adjusting it's position on the track, by changing the forward and backward directions on the controller several times. Once it is put in the reverse direction, it stops again after going about one foot.

Thank you for any advice you can give.