[amsat-bb] SatPC32- Auto Sat Change?

I have successfully implemented control of my Yaesu G-450/G-550 rotors via ERC using SatPC32. I can now track satellites across the sky as I await arrival of transverters to work with my Flex-3000/1500 combo. I have not been able to get the Auto Sat Change feature to work, however. I have set up prior.SQF with a list of prioritized satellites, and set Auto Sat Change to “A+”. When a satellite becomes available, the lettered box highlights, but no changing of satellite to the active one occurs on the screen. Only after I click on the highlighted letter box does it activate the available satellite, allowing rotor control, and later, I hope, frequency tracking. What am I overlooking? Thanks for any help. Al, KI7RM