hi, got a 2-8-0, that was perfect. Suddenly ground to a halt, and when i test it the rear two wheels move in a different direction, to the other six, hence it just rocks. They are joined by a single rod. How do i correct this, thanks, fraser

hi, just acquired these,  DCC on board, Read  chip, cv etc set to 008, 009 and put on track, there is a hum but no movement. On DC, perfect. What gives, john