怎么用loadmovie进来的按钮控制主场景的mc

如何用loadmovie进来的按钮控制主场景的mc
如何用loadmovie进来的按钮控制主场景的mc

mcA.loadMovie("mcB.swf");
_root.mcA.btn.onRelease = function() {
.......
};
按钮失效，不知是不是路径问题，请教各位高手指点迷津！


[解决办法]
mc第一帧代码：

JScript code

var loadListener:Object = new Object();var count = true;loadListener.onLoadInit = function(target_mc:MovieClip):Void  {    loadmc.btn.onRelease = function() {        if (count) {            aaa._visible = false;            count = false;        } else {            aaa._visible = true;            count = true;        }    };};var mcLoader:MovieClipLoader = new MovieClipLoader();mcLoader.addListener(loadListener);mcLoader.loadClip("mc2.swf",loadmc);