Just put my new train set together for the first time and have a problem. 

The engine wont run until the knob for the controller is turned past the halfway point.  Once it starts, it runs at one speed (full) no matter where the knob is above the halfway point.  Below the halfway point it shuts down.  The halfway point is acting like an on-off switch.

All of the function buttons work the features of the engine no matter where the speed control is set.  I have already tried reassigning the engine to another address with the same results.

Before I call customer service, I was wondering if there is a reset or calibration procedure.