This one is really getting on my nerves
I use DP4.6 on OSX.3.9 (and OSX.4) with a motu 828MK2 and my keyboard is a XP30, Roland. All of that on a G5 dual 1,8 with a lot of RAM

I've been on DP for about 8 years so I know it pretty well, and this configuration isn't new to me either...
I AM COMPLETELY UNABLE TO RECORD ANY MIDI data on any projetc (though I have all the lastest updates fort DP, the 828 etc...)
PLUS the 'MIDI in' led on the 828mk2 is always ON (orange !)
If I write some MIDI notes with my mouse, it won't play them after.
On the MIDI configuration, when I test my XP30 the music will play normally....
WHat can I do ???