My steppers wont turn

So I turned everything on and tried to test my axis' with emc2's stepconfig tool and the steppers wouldn't spin. im not sure what the issue is. the steppers turn when not hooked up to the machine frame. could the nuts on the end of the lead screw be to tight? could my amperage be to low? I double checked my wiring. I'm stumped. I need to sleep on this.