I also experience this problem. It has to do with the controller detection routine. It's supposed to detect a controller when plugged in without any external input but it's not quite working properly. I'm still investigating the cause. The reason that pressing B and C works is because the detection routine looks for a low signal on those same data lines but on a different part of the select cycle. A stock Saturn controller has those 2 data lines tied low internally when on that same cycle which I believe is how the Saturn console detects when a controller is plugged in. I hope that makes sense.One thing, which I'm not complaining nor fussed about, it seems I need to hit buttons B and C simultaneously on the Retrobit controller before it's detected and responsive. Normal behaviour?