Icecreamslick--Just checked my KT. Here's some information about matching the wires of the DMD and the gearboxes.

Right Gearbox--yellow motor wire to purple DMD wire; green motor wire to white DMD wire.
Left Gearbox--yellow motor wire to blue DMD wire; green motor wire to orange DMD wire.

Are you using one battery to power both the MF and DMD units? Is the communication wire (DMD to MF) firmly attached?

Hope ya get it debugged[:@]