Midi OUT failure signal on PadKontrol

[thepat]

Hello there,
For some reasons since a couple of days,my PadKontrol doesn't send any Midi signal (or maybe some wrong data).
Anyway it doesn't work anymore and I tried everything
I used to control via Midi my Echoplex. I'm using a M-Audio Fingerpad 16 actualy but I would like to use my PK again.
I tried the PK with a synth via midi and it doesn't work either.
The USB port work perfect. Does anybody got an idea??
Thanks in advance