Accessing the main timeline

i am still in the process of coming to terms with AS3. while some things such as responding to mouse events came easy, yet other topics such as classes continues to elude me.

anywho, I am still in the process of updating my website and I have stumbled upon another obstacle. I have a button that resides in a nested movieclip. when the user clicks on it, the playhead will jump to the frame label named projects which resides on the main timeline.

this is the code that i have thus far:

projects_mc.addEventListener(MouseEvent.CLICK, clickProjects);
function clickProjects(event:Event):void
{
gotoAndPlay(“projects”);
}
projects_mc.buttonMode = true;

how do i go about achieving this?

Oh, God how i miss behaviors! Some assistance, please.