ok so i have 3 bachmann spectrum DCC equipped steam Locomotives....one is the modern 4-4-0 PA & MA...the other 2 are Pennsy K4 4-6-2's one is post and the other pre-war....the 4-4-0 worked perfectly and responded well to the Bachmann EZ Command DCC system....the two Pennsy's work in analog mode but not in DCC operation...and they make a pretty significant humming noise when sitting on the track in DCC operation...from what I understand these locomotives are supposed to already be DCC equipped for speed, light and direction. When I try to program the Pennsy's they seem to respond to the programming but after that...nothing!!! I have had them for about a year but this the first time I actually got to try them out...so they are brand new and right out of the box....any advice, suggestions, or help?!?!?!