why does cd audio not play after i created CDA music on disk ?

I created my first Audio cd, but the problem is it only plays on th PC,
when I put it in the combo CD/cassette player ,it said there is no cd
in the cd player.

Please help. Is this because old cd music players were only created for
comercial Cd Music or is there another way to do this ?

enxtension is CDA

 

If it is an audio cd , your player should play it. Try another player.