All of a sudden can not burn CD's

[C]

I've been burning MP3's onto CD-R's forever on this computer, now all of a
sudden it won't work. I just downloaded a CD like I always do and it prepares
them, then writes them to the disc very quickly and finalizes it and in 20
seconds my CD is burned, but when I put it in my cd player which used to play
my burned cds it says there is only one song on the cd and won't play it, but
the data is still on the cd. I don't understand why it won't work, I am doing
things like I always have. Help!