PLEASE Help - adding new value to dropdown

[bash bashtoko]

I have this code

<h:selectOneMenu id="beesh" onchange="submit()" valueChangeListener="#{testActionListener.processValueChange}" value="#{userBean.favCoffee2}">
<f:selectItems value="#{userBean.favCoffee2Value}" />
</h:selectOneMenu>


When I try to add a new option to the component .. it produce a class cast exception >>>>

java.lang.ClassCastException
at javax.faces.component.UIComponentBase$ChildrenList

Map<String, Object> map = new LinkedHashMap<String, Object>();
i.put("java", "course");
source.getChildren().add(map)

What is the problem.. please help..

Thanks..

[Krishnakumar Ramanathan]

are yu able to solve this issue ?