That happened to me several years ago, but I don't remember how I fixed it (I guest from now on I will start to write notes)... Yesterday after I've installed the new Galil Plugin Version 1.6 it was fine until I powered the machine up today which now I can only jog one axis at the time via keyboard Arrows and Page-Up/Down.
I run Galil DMC-21x3 Ethernet and Mach3 with Allen Bradley Ultra-100 servo amps. Any help will be appreciated!
Thanks,
Luiz