Ok just an update.
i took the Z axix motor off, hooked it up to the controller and mach 3 , ran some GCodes, now it vibrates as each gcode for the z axis comes into play but the motor don't spin, so at least i know the computer is talking to the controller, i did some investigations and noticed that the step motors are some cheap ones from "Keling Technology" you can buy them for $39, so it maybe fair to say that the motors may not have enough power to turn, dunno just a thought,
any suggestions
thanks