[JesterAntik]

попробуй вот так

var rbg:RadioButtonGroup = new RadioButtonGroup();
			
var rb:RadioButton = new RadioButton();
rb.label = "LABEL1";
rb.selected = true;
rb.value = "1";
rb.group = rbg;

var rb2:RadioButton = new RadioButton();
rb2.label = "LABEL2";
rb2.selected = false;
rb2.value = "2";
rb2.group= rbg;