Not all cd players are capable of reading CD-R made on a computer, really has nothing to do with the quality of the cd being made, some cd players just aren't able to read them.
"Not all CD players (and especially not all audio CD players) are CD-R capable at all. The reflection of a CD-R is different from that of a pressed CD. If in doubt, try it out. Sometimes a player can recognise one type of CD-R and not another. On a different player, the situation may be different again."
Right from this website CD PLayer
"Not all CD players (and especially not all audio CD players) are CD-R capable at all. The reflection of a CD-R is different from that of a pressed CD. If in doubt, try it out. Sometimes a player can recognise one type of CD-R and not another. On a different player, the situation may be different again."
Right from this website CD PLayer