Never thought waiting seven years to update my software would be such a relearning experience...lol
In Flash MX to add audio into a movie clip, animation, etc, all you needed to was add the file to your library and drag it onto the frame in which you wanted the audio to play. However when I try this in CS5.5 nothing happens. I'm sure there's just a different implementation now, and I don't know what it is.
Thanks for the help guys
If you have the sound file in your movie's Library, and you select that sound, you should be able to test the sound right in the Library. This will let you know that the sound works in Flash.
To attach a sound to the timeline, select a keyframe. In the Properties window you should see a listing for sound. There should be a pulldown listing of all of the sound files in the Library. Select the sound that you want to play. The sound will begin to play from that keyframe when you play the movie.