I have a Casio CDP-220R. I have used midi-ox to check it is properly connected to the computer (input and output). I have just got Music Maker Plus and it recognises the device so I have selected it. However, when I press record, it says "Recording cannot be started. No recording device connected. Please check your audio settings."
I have fiddled with audio playback settings too, in case the driver matters - I have tried Wave driver, Direct sound. and Music Maker ASIO. It makes no difference.
Note when it is selected in Music Maker, midi-ox says it can't find the memory to connect, which the help page says is because it is connected to another device, so I am pretty sure it is connected to Music Maker.
The computer I am using is Windows 10. I am very new to this - what do I do next?