well it appears that the page cannot be found but i have found this that can help anyone with this problem...
i found it on flash help and it realy good and i know that shadowfan002 have allready did what you needed to do but if someone else need this here it is:
Synchronize a sound with animation
To synchronize a sound with animation, you start and stop the sound at keyframes.
1.Add a sound to a document.
2.To synchronize this sound with an event in the scene, select a beginning keyframe that corresponds to the keyframe of the event in the scene. You can select any of the synchronization options.
3.Create a keyframe in the sound layer’s Timeline at the frame where you want the sound to end. A representation of the sound file appears in the Timeline.
4.Select Window > Properties, and click the arrow in the lower-right corner to expand the Property inspector.
5.In the Property inspector, select the same sound from the Sound pop-up menu.
6.Select Stop from the Sync pop-up menu.
When you play the SWF file, the sound stops playing when it reaches the ending keyframe.
7.To play back the sound, simply move the playhead.
_________________...sorry for any bad understanding...im not so good with my english XD...