go to esc menu, options, controls, scroll down, asign a key (ctrl J for gui and J for wrench works well for me) if it does not make text apear on yuor screen when you press jvs wrench key (for me, J), then wrench soemthing, ctrl J, and then make your door, click the set/modify button, clsoe out of that and clsoe out of the wrench gui. i ahvent figured out which addon makes the wrench not work