Anyone have any ideas why my Link6 cable (AES/EBU) is not displaying in the output block of my presets when the cable is connected? Both the Helix LT and Powercab Plus are turned on - but I'm ot able to see the Link6 options for cabs displaying in the Helix LT? I have upgraded the LT to most recent version, and the Powercab Plus, but still cannot see the connection being made.