AS3- movie clip to mainline

I’m having trouble jumping to another frame (15) in the main stage named “main” when closing a movie clip on frame 10…

ArgumentError: Error #2108: Scene main was not found.
at flash.display::MovieClip/gotoAndPlay()
at welldone_mc/nextlevel_function()

the actions are as follows:

stop();

nextlevel_btn.addEventListener(MouseEvent.CLICK,nextlevel_function);

function nextlevel_function(evt:MouseEvent):void {

gotoAndPlay(15, “main”);

}

i’ve tried labelling the frame, but the problem seems to be locating the scene “main”?

Any help much appreciated! B