New to Java

<h:selectOneMenu id="exist1" styleClass="selectOneMenu"
value="#{selectBean.selected}" >
<f:selectItems value="#{selectBean.list1}" />

<a4j:support event="onchange" actionListener="#{selectBean.optionChanged}" />

</h:selectOneMenu>

Tag libs:

<%@ taglib uri="http://richfaces.org/a4j" prefix="a4j"%>
<%@ taglib uri="http://richfaces.org/rich" prefix="rich"%>

I get a warning message "This tag cannot be nested within the <h:selectOneMenu>" at the below line

<a4j:support event="onchange" actionListener="#{selectBean.optionChanged}" />

SelectBean:

public void optionChanged(ActionEvent e){
    try{
          logger.debug("IN +++++++++ ACTION +++++ EVENT +++++++ METHOD ++++++++++++"); 
	//FacesContext facesContext = FacesContext.getCurrentInstance();   
	      //    this.selected = (Integer)e.getNewValue();
	      logger.debug("Select Item ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;" );
		      
	   //   this.getExistingOwnersInfo(this.selected); //// DB call to fill other fields on the page
	//      facesContext.renderResponse();
        }catch(Exception ex){
         logger.debug("In optionChanged Method -----  ERROR");
         ex.printStackTrace();		
        }
}	

I tried to comment out everything to atleast see if the method is getting called..

No luck since 3 days..

Please help me .