A Little Problem

I'm guessing this is really simple but I just can't figure it out
The scenario: I have 2 movieclips on the stage (mc1 and mc2) and I want to start mc2's animation when the animation from mc1 has finished..
What I did: I thought that it will work like in AS2 and on the last frame of mc1's animation I put: root.mc2.play();
The problem: Surprise it does not work, it gives me this error : 1119: Access of possibly undefined property meniu through a reference with static type flash.display:DisplayObject.

So anyone have any ideas?