ActionScript 2.0 :: Load External Swf File With ComboBox?

I have a combobox (comboBox) on the stage and an empty movieclip (holder_mc).

I want to load 3 external swf files in the holder_mc once the values in the combobox has been selected.

there are only three values in the combobox(Red, Black, White).

I have also this code on the first frame of the main time line:

function change(evt){
trace(evt.target.selectedItem.label);
}
comboBox.addEventListener("change", this);