Hi! I have a problem with the black box probe function. I have a cnc with a vfd driven 2.2kw router, but when connecting my probe it will light up as soon as i connect the clip to the drill bit, without touching the plate. The thing is, it did work for a couple of weeks, and was brilliant to use, but suddenly I get this problem out of the blue. I have measured out my probe cables, there are no short. The probe show nothing until I touch the clip to the bit, or the router itself. The router is grounded. Any ideas? Could this be a problem with the Black Box or with the vfd or router? Any help appreciated.