My old sensor would not connect (5 in 1) to both of my monitors (01512-RX). Called support many times with waits of over 175 minutes. Did ALL the steps mentioned here. New batteries Energizers, and next to each other right on my desk. Did I waste another $80? Changed ABC letters and still nothing. Have had this system for years. Am using the new ACCESS. Wish support would help me out. Been down for weeks.