Schantz Organ Midi file creation without actual recording
I'm not an organist, I am a flutist and pianist. I'm fairly adept at using Musescore to create midi files to accompany myself on flute with a keyboard when no live accompaniment is available. My church is currently without an organist. We have a Schantz Organ (Opus 1504, 1978) that was refurbished in 2018 with midi added. If an organist records a midi live, playback is excellent on the organ, but if a midi file is created using Musescore software and exported as midi, the midi file is not recognized by our Schantz organ ("Unknown file"). I have taken the live performance midi's opened with Musescore and studied them endlessly, but when I create a different hymn trying to replicate the midi channels, it still says "Unknown file" on the organ's midi player. Could anyone help me figure out what I am missing in this process. We really want to be able to play hymns via midi on our church organ without having to hire an organist to pre-record every one. (However we are actively searching for a new part-time organist.) Thank you.