My brand new O gauge NW2 doesn't reliably cycle through the e-unit sequence.  At first it only would go forward.  I flipped the run/lock switch back and forth several times and it started working--intermittently.  It still gets hung up on forward sometimes or slips out of neutral into forward.  Is there some sort of break in phase with an electronic e-unit?!  It seems so unlikely.  Might this problem resolve itself?  Is there something else I could try or look at before I consider returning this engine?  I never experienced this difficulty with three earlier Williams by Bachmann engines.  

Update 11/27.  The e-unit is now cycling successfully.  In this instance, the train fairy has been kind to me!  The NW2 navigates my old 0-27 turnouts and curves allowing me to work sidings off my more generously built main line.  Just in time for my annual Treats and Trains party!