I am trying to address sounds and "app states" of iSymphonic Orchestra on my iPad with Program Change/MSB/LSB midi messages. iSymphonic provides this option, but using the app "iMidiPatchbay" to send these messages I haven't been able to succeed so far. (In the past I successfully used iMidiPatchbay to change sounds of my former Ketron SD1000).
Is this problem related to yours? I'm not very familiar with these procedures on the iPad yet...