ActionScript 2.0 :: SetSize On CheckBoxes From Array?

Im creating and position dynamically created CheckBoxes from an array.The boxes are created. They are correctly positioned. They get the correct label text, and they are named box0, box1, box2 and box3.But setSize does not work.

Below is the script.

ActionScript Code:
var myArray:Array = ["oneoneone one one one one", "two", "three", "four"];
for (var i in myArray) {
this.createClassObject(mx.controls.CheckBox, +i, i, {label:(myArray[i]),_y:(i*20),selected:(false), _name:("box"+[i]), setSize: (500,22)});
}