I have a Bachmann Spectrum N&W 4-8-4 Class J Passenger Loco (Sound) #612 (1950's), Bachmann Item #83903, and I've completely lost control of the unit.  I have an MRC Prodigy Express DCC unit, and I've been trying to set the loco up to be identified as its side number (612).  Now I have absolutely zero response from the unit.  I've been trying to follow both the MRC instruction manual and the Tsunami Spectrum Steam Sound User's Guide.  Nothing is working. I am new to DCC, and I am pretty frustrated at this point.  Can someone please explain (in plain English) 1) how to reset the loco and 2) how to program it so that it is identified as Loco 612? PLEASE!