Portion of movieClip animation stops

I have a stationary movieClip (house) that contains embeded, animated movieClips (Siding). When I hit a button to change the color of one of the embedded movieClips, that particular clip starts moving while the animation continues everywhere else.

My code is very simple.


button.addEventListener(MouseEvent.CLICK, changecolor);

function changecolor(e:MouseEvent) {
    
    var siding_color:ColorTransform=house.Siding.transform.colorTransform;
    siding_color.color=0xCCCC99;
    house.Siding.transform.colorTransform=siding_color;
    
}

Why is my ‘Siding’ movie clip stopping when the color is changed? How can I avoid this?

Thanks!

Aaron