Gecko 320 not pulsing

The motors stop turning and are singing with no faults . The wireing
to the motors had to be reversed. Thanks for the info. But now the
interfaced board is not pulsing or turning the motors. the board is a
PMDX -120 . All the contacts work with the software which is master 5
Tne motors are minerta rm servo . I beleive the size are some what
adequate when the motors where wire backwards they move the gantry
fine.I have set the dim switches to demo mode and still nothing
happens I wired as the paper work stated.