Hey, I've just bought a philips lx700 and an optical cable. My philips dvd-recorder (dvdr80) gives the signal (i can see the red light) but my receiver doesn't 'notice' it. The manual says to select audio, you have to press the programme button for 5 sec, then you get a menu where you can select 'digital input'. Then I have to press the programme button again and, according to the manual, I can choose between 'coaxial' or 'optical'. But I don't get the option optical! Can anyone help me?