Referencing an MC from attachMovie

Hi all, quick question – I’m confused as to how to reference a movieclip after using the attachMovie method. Here is my code:


box1.onRelease = function():Void  {
    activateBigBox();
    bigBox.dtBigBox.textbox.text = "portfolio";
    attachMovie("textbox1", "mcTextBox1", this.getNextHighestDepth(), {_x: 175, _y:-8.3});
};

now, if I want to reference that mcTextBox1 movieclip for an onRelease function how would I call it?? everytime I try to use

box1.mcTextBox1.onRelease = function():Void…

nothing seems to work!! Thanks in advance for any help!