Set color on dynamic created mcs

1

Hi, i have a newbee problem when changing the color from attached clips.

I create a mc on the root level from the library by attachMovie (box1).

box1 creates a second mc from the library by attachMovie (box2).

On the root level I have a button who change the color of both mcs by new Color / setRGB.

But box2 will have the same color than box1, regardless which color I set to box2.

Button-AS (FLA is attached):


this.onPress = function () {
    // set box1 to green
    (new Color(_root.my_box_dyn1)).setRGB(0x00FF00); 

    // set box2 to red
    (new Color(_root._root.my_box_dyn1.my_box_dyn2)).setRGB(0xFF0000); 
}

Whats wrong?