When the SmoothStepper board is connected to my computer and I try to turn my computer on, nothing happens until I turn my computer off and on. The first time I try to turn my computer on, the power LED on my monitor is still yellow instead of green. When I turn my computer off and on, my computer boots normally. If I turn my computer off, disconnect the SmoothStepper board from my computer and turn my computer on, my computer boots normally. I tried to cut out a part for a model of a subway car through SmoothStepper but something went wrong and the part was ruined. Is something wrong with the SmoothStepper board or I didn't set up Mach3 program properly?