it's not unusual to get a bad batch ... ideally go somewhere else and buy a box of 5 or 10 (tesco do 5s)
or blag one from a friend.
I've inherited discs from friends who couldnt use them - worked fine for me - similarly I've given them away
because you are melting a plastic film - there are a few reasons why it can fail
also the play and record heads are different so it's possible for a recorder to become a player - but try different discs first



