Have tried two different DCC systems and DC.  Nada.

I bought a brand new in box 0-6-0 a couple of weeks ago and finally got around to installing the sound card this weekend,  Stupidly did not test engine before installing the sound card.  Buttoned everything back up, and have sound and headlights under dcc control, but the engine itself just sits there.  Any advice on troubleshooting?  If its something as simple as a loose motor wire, could someone please tell me how to disassemble to get to the motor?