How To MUTE A Sound Embedded In A Timeline Layer

**[FONT=Arial][SIZE=3]I am developing a flash web site using ACTIONSCRIPT 3. There is a menu of small icons that, when one of them is clicked, the program loads the correspondent SWF into a loader and then presents it in a “virtual screen” ( a rectangular area ) in the web page. The problem is that some of these child SWFs have an embedded background sound and I DO NOT KNOW how to mute them from the main SWF when a user decides to do so by clicking a “mute” button.[/SIZE][/FONT][SIZE=3]

[/SIZE][FONT=Arial][SIZE=3]Each SWF embedded sound has its own layer in its timeline and is set as [COLOR=blue]Sync: Event, Repeat:1[/COLOR].[/SIZE][/FONT][SIZE=3]

[/SIZE][FONT=Arial][SIZE=3]Any idea ?[/SIZE][/FONT]**