Have just had the tv6 box installed. Previous to that I had the TiVo box which was connected to my Denon receiver through the arc socket. When we swapped the boxes today. I was getting an error message saying the tv is not hdcp 2.2 compatible. I have had to connect the box to the tv through an optical cable. Which works I have the Denon avr x2300 which is hdcp 2.2. Do I need to get a different hdmi lead. Really confused why this has happened.