This is a good one...I bought 2 "Toymaker Santa Express" sets last Christmas; one for my son & one for me. I run "old style" Lionel track & my son is using the newer FastTrack. Both sets ran fine last year on the two "different" tracks.  This year, my loco makes sounds but will not run on my old-style track...brought loco to my son's on Christmas Day, and my loco runs fine on his FastTrack. I ran a different loco fine on my track & transformer, so that should eliminate a bad electrical connection to that track.  Is there an "On/Off" switch that I am missing?  I see I can turn off sounds & smoke.

Frustrated in New Jersey