tapes don't work?

i have an aiwa cx-nsz20ez music centre,it works fine except for the tape decks. All lights on the front buttons(pause,play rw and ff) are on but there is no attempt to play. The only other thing i've noticed is that when i first turn on the machine and select the tapes there is a "clicking" sound from the second tape deck for a very short time (1-2 secs).