DSMX can bind, but no signals on Orange Plus and standard carrier

Hi, I have a standard carrier board with an Orange Plus, connected to a DSMX satellite receiver via the SPKT port. I can bind the receiver ok, but nothing I do allows me to see any received signals in Mission Planner when connected via USB. I know on some carriers you need to set jumpers/solder bridges, but I don’t believe the carrier needs them. I have confirmed the satellite and cable are working, bound correctly and functional. Is there something I’m missing?