The cable I use instead of the USB conected to the midjay is ordinary midi in and out. Midi out on in Midjay and midi in on out keybord, this work perfect, the only time I use the USB on the midjay is when I transfer songs from my computer and this is wirking fine,
I try to upgrade back to 4.0 but there was only e error so I keep on going with 4,2i and wait until the next update
Hasse