I have an O1/W with version 55 ROM. I can do everything via MIDI except it will not accept program changes from an outside source. I don't think I have any filters on, and I have loaded the factory default settings, and am sending and recieving on channel 1. Also, I can send and recieve sysex data, I can do program editing via Change It!, I just cannot get the program or COMBI number to change from an external MIDI device. What am I missing? Everything else is working fine.