Make Sound Effect Play On Collision?

Im an aspiring flash game developer struggling with a bit of code in my upcoming game, I want to play a sound(A "ding") everytime the main character touches a cookie on stage. The main character follows the mouse cursor, and the cookies fall down from the sky.

I have scripted the cookies main class, with this function(which works fine)
private function eFrame(e:Event):void{

Code:
private function eFrame(e:Event):void{
this.y += 3;//move the bell slowly downwards
if(this.hitTestObject(_root.mcMain)){//if this touches the main character
_root.mainJumping = true;//make him jump

[Code].....

And I was hoping it would go into the library and play the sound bit named "bellSound" but it doesnt do this, instead nothing happends, not even any errors under the "Compiler errors" So no im a bit lost, as I do not know how to make this work, so a sound is played when the main character touches the cookie.