Problems, cnc/electronic idiot

I am having problems getting my cnc system running properly. I have
gecko 320's and power supply kit from camtronics. Just finished it
up today, and can't get it to function properly. Power supply checks
out fine. On the db25 breakout board what do I need connected besids
step and direction from each axis? Do I need to run a 5v from my pc
power supply to this, what about a ground? Looking at the wiring
diagram, all that goes to the break out board is the step/dir from
the drives. I tried it with just the step direction, and the servo
motors engage, but they aren't getting any signal, anybody got any
ideas where I should start? Thanks