Do not send MSB64 - MobileSheets uses zero-based indexing. So according to the documentation, you have to send MSB63, not MSB64. This would be true for any of the other fields too. I'm also unsure were you are getting LSB 32- as that would point to library 9. Is that what you want? Library 9? The LSB field determines whether you want single part performance, User 1-16, Library 1-40, multi-part preset 1-16, multi-part user 1-5 or multi-part library 1-40. Refer to the table again to get the right value for that. Then within that library, the program change determines which entry to load from within that bank.
It will help to know which thing you are wanting to load. If you send MSB 32, LSB 0, then a value like 5, that would load the 6th single-part performance. Can you test something like that to see if the keyboard responds? It's also a little strange to send and receive on different channels - for a simple test, can you try changing that to just 1 for both and set the keyboard to send and receive on channel 1? I just want to simplify things.
Mike
It will help to know which thing you are wanting to load. If you send MSB 32, LSB 0, then a value like 5, that would load the 6th single-part performance. Can you test something like that to see if the keyboard responds? It's also a little strange to send and receive on different channels - for a simple test, can you try changing that to just 1 for both and set the keyboard to send and receive on channel 1? I just want to simplify things.
Mike