I just got a Boss Es-5 since it could control patch selection via midi. However, no matter what I do, I cannot seem to get a program to change on the M5. In troubleshooting, I've tested the midi out works as I've backed up my patches in a sysex file. However, when I load the file using midi-ox, it shows it loads but nothing shows on the M5 to indicate it is receiving and when I power off/on, I don't see my restored patches (I did a factory reset after backing up). I've hooked another midi controlled device up to the midi out of the M5 (and to the in of the other pedal) and when I change patches in the M5, it changes patches 1-24 of the slave device. So, midi out is working fine (I think). I've also tested the ES-5 and found it can control a Boss ME-5 and Digitech Whammy DT without any issues. For some reason, I just can't make it control the M5. I've also tried numerous cables. I feel like I'm overlooking something simple, or... my unit is defective. Any advice or thoughts appreciated.