Combo box sound

Hi
Is it possible to add a sound to a combo box so when the user clicks an item from the drop down menu it plays a sound.
I am using flash cs3 and use a xml file to load my pics.
I have a xml connector and combo box and a movie clip loader components on stage. All are named and binded and works fine. In my action script I have a trigger added to my xml connector name. I also have imported a sound into the library and set the linkage to export for actionscript and both checked export in first frame and unchecked export in first frame
I have tried the code below but it does not work.

<code>
xcFrames.trigger();

var my_sound:Sound = new Sound();

var myListener:Object = new Object();
myListener.change = function(){
my_sound.attachSound(“sound_fx_2”);
my_sound.start();
}
cbNames.addEventListener(“change”,myListener);
</code>

Bern