This season we are experiencing a strange DMX problem in our Venue ( only with Avolites & GrandMa Desks and not with our own Chamsys desk ) and I would like to know the cause... Our setup is: 2x 5 pin DMX line from FOH to DMX booster patch ( +- 20m ) 1x Cat 5 cable with passive 4x DMX to cat 5 c...