Hi guy's, Iv'e just taken delivery of a new digital audio cable 1694A (belden) to replace my optical cable connecting my pioneer 575 dvd player to my kenwood KRF-V5050D. When i removed the optical and connected the digital coax i got no sound!? I connected the cable via coax out (dvd player) and digital in,dvd,(amp). I disconnected the coax and reconnected the optical and it worked fine again? Iv'e looked at the manual and settings but can find nothing wrong. Am i missing something obvious or is there a bigger problem? Cheers, Q.