I have a quadrature encoder, with index, installed and connected to PMDX-424. I have reviewed the configuration notes and double checked the settings in Mach4 and PMDX plugin configurations multiple times. In spite, Mach4 lathe will not display actual spindle RPM. Please tell me what I am missing. Mach4 build: 3233. Smart Bob plugin: 0.52.254. Firmware: 0.58.205