Disklavier

Hi everyone

I just got my mpx1 and I am quite happy with it. This group is really great for finding so many hints and solutions pertinent to those wonderful instruments ! I have one question here: I do not succeed in establishing midi transfer between my Imac towards the disklavier (through midi ports via a usb Midiman Uno interface). The contact works fine in the reverse sense: from the disklavier towards the Imac.

I tried to follow all procedures concerning midi channels etc but it just doesnt work, nothing , nada. Nothing also on the synth parts of the mpx1. I checked the cables with another set up and they are good...

Any hints...