Why my text it empty when click

<span id="sex"></span>
<script>
    var radio = new AW.UI.Radio;		
    radio.setId("sex");
    radio.setName("sex");
    radio.setItemText(itemTextArray);    
    radio.setItemValue(itemValueArray);
    radio.setItemCount(2); 	
        radio.setClass("flow", "horizontal"); // if this row disable it work	
        radio.setSize(200,40);
    radio.refresh(); 
<script>