MIDI files created using the "Song chords – Export to midifile" function do not contain the "Yamaha XG System On" message. As a result, track 9 does not play correctly when using Yamaha styles.
This issue can be resolved by adding the specified sequence to the beginning of the MIDI file.
F0 08 43 10 4C 00 00 7E 00 F7
Thanks for posting.