Cant remove child from stage

programming flash
1

Hy everyone,

Im trying to remove a swf that i import to the stage, but it is not working:

Im doing like this:


function btn_cima_3call(clickEvent:MouseEvent):void{
    page = 5;
    esconder();
    content.gotoAndStop(page);
    ld.load(new URLRequest("trabalhosV0.swf"));
    ld.x = 0;
    ld.y = 100;
    addChild(ld);
    }

So when 1 button is pressed this swf is imported to the stage. but im now trying to remove this when another button is pressed and it isnt working, dont know why. :confused:
simple like this:


function btn1call(clickEvent:MouseEvent):void{
    removeChild(ld);
    page = 1;
    content.gotoAndStop(page);}

Hope u guys can help me on this