Sound/Music Questions

Ok...Im making a flash video and want to have a song playing from scene 2 to the end of the movie. I've got 2 problems though. First when I try to import an MP3 file into Flash it says that the file wasn't imported because there was a problem reading it. I want to use MP3 instead of WAV because of the smaller file size. My next problem is getting the song to play through the whole movie. I can get it to play for one scene but it stops the next scene. How can I get it to play through the whole movie? Thanks for any help.

Edit:Forgot to mention I'm using Flash CS3 Professional

You can ignore this thread. I solved my own problems, I was trying to make things more complicated than they really are.