Actionscript Code:
function btnClicked(e:MouseEvent):void {

    switch (e.target) {
        case Aplayer1 :
            setChildIndex(Aplayer1,numChildren - 1);
            TweenMax.to(Aplayer1, 0.5, {x:159, y:266, scaleX:1, scaleY:1, colorTransform:{tint:0x000000, tintAmount:0}});
            this.addChild(infoA1);
            infoA1.x  =  126;
            infoA1.y = 389;
                        //here i want to remove the movieclip that loaded from others buttonclicked
            this.removeChild(infoA3); 
            this.removeChild(infoA2); 
            this.removeChild(infoA4); 
            break;

        case Aplayer2 :
            setChildIndex(Aplayer2,numChildren - 1);
            TweenMax.to(Aplayer2, 0.5, {x:253, y:268, scaleX:1, scaleY:1, colorTransform:{tint:0x000000, tintAmount:0}});
            this.addChild(infoA2);
            infoA2.x  =  126;
            infoA2.y = 389;
            break;

        case Aplayer3 :
            setChildIndex(Aplayer3,numChildren - 1);
            TweenMax.to(Aplayer3, 0.5, {x:364, y:264, scaleX:1, scaleY:1, colorTransform:{tint:0x000000, tintAmount:0}});
            this.addChild(infoA3);
            infoA3.x  =  126;
            infoA3.y = 389;
            break;

        case Aplayer4 :
            setChildIndex(Aplayer4,numChildren - 1);
            TweenMax.to(Aplayer4, 0.5, {x:506, y:274, scaleX:1, scaleY:1, colorTransform:{tint:0x000000, tintAmount:0}});
            this.addChild(infoA4);
            infoA4.x  =  126;
            infoA4.y = 389;
            break;
    }
}

When i click Aplayer1 it will load infoA1 movieclip to the stage, click on Aplayer2 will load infoA2...but it will overlapping infoA1,infoA2...

i try to remove the child with the script above it will show up error 2025.

how to resolve this problem?