Hi Terrym and thanks for advice
Anyway the problem is solved but .......strange
I deleted the DrumBrute Driver as recommanded and hooked and power on the DB
2 drivers appreared in my MIDI Utilitaire control pannel
The DB driver
A new strange USB/MIDI driver (with the same icon than the DB one

?) I renamed that driver to "DrumBrute Updater" and ......................
IT WORKS FINE
Strange behavior ??
I update my firmware