ilius

hi, i got my first md a few days ago (SONY MZR55). it's connected to my pc with opitcal digital connecting cable (POC-15B). i use Sound Blaster AudioPCI 128. everytime i attempt to record anything, my MD shows "no signal" message on the screen. am i doing something wrong? if so, what can i do? it may be easy for you, but it's my first MD ever, so... i'm out of ideas.. please help.