Help with Burning Mix to CD

Hi, I recently purchased MV7, Saved my first mix as .wav file, converted it to MP3, but I can not burn it to a CD due to burning file rights. Is there a way around this, or am I not recording my mixes properly? So far I've had to settle to burning my mix as a data file cd, unfortunately it won't play in my car or some other players. I could really use some help, thank you.