There have been all sorts of weird copy protections trialled in the past. I used to have a hifi CDR and around the mid to late 2000s I had serious problems copying some tacks even on there, digital copying just didn't work and I had to play them and record them though the audio inputs. The same sort of thing may be happening here.
Sorry to not be more useful but if that is the case I don't know any workaround except manually recording them through an audio input.