cd burning
 

I recently tried to burn a cd (for my first time) from my internal cd burner. I had to drag my downloaded mp3s from the downloaded documents file because the would not drag from shared files, and drop them into my cd desktop item. Then I chose "burn cd" and the program seemed to burn it and then it locked the cd. I ejected it, and now it won't play a single thing!!! Can someone please tell me what to do??? I am probably just missing a step or something.
thanx,
pam

(imac os 9.2.1)