ActionScript 3.0 :: How To Set Up Play / Pause And Replay Buttons

I have a couple of movies to add controls to and the consist of a series of layers with classic tweened movie clips. There is a button layer set up along with all the buttons, and an AS3 layer set up. This is the initial code I set up on the AS3 layer first frame:

Code: Select allstop();
innercircle.stop();
go.AddEventListener (MouseEvent.CLICK, startplaying);
function startplaying (event:MouseEvent):void {
play();
innercircle.play();
}

innercircle is a movie clip which runs throughout the entire movie, so that's why I picked it to use in the command above. When tested this should enable the play button to work, however it's not working and brings up this error:
1061: Call to a possibly undefined method AddEventListener through a reference with static type flash.display:SimpleButton.