Hi, I have 2 g201's and recently upgraded my z axis driver to a g203v. When I hooked up the g203v and turned the power on, the motor locked up, but wouldn't jog. The x and y jog fine. I tried switching the step and direction wires with the x axis driver, and now the z axis jog buttons make the x-axis move, so it's not the step and direction wires causing the problem. I have the g203v wired exactly like the other 2 geckos, using the same current set resistor. Any ideas?