hi,  i am upgradaing richfaces from 3.3 to to 4.2 so i change tages in <rich:pickList> is not showing values in right sides please help

here my code

<rich:pickList id="programSelect"  value="#{circularController.selectedUsersList}"

                                        var="items" sourceCaption="#{msg.available_List}"

                                        targetCaption="#{msg.selected_List}" listHeight="100"

                                         required="true"

                                        requiredMessage="Please select from available list">

                                        <f:selectItems value="#{circularController.usersList}"></f:selectItems>

                                        <rich:column>

                                            <h:outputText value="#{items}"></h:outputText>

                                        </rich:column>

                                    </rich:pickList

#{circularController.selectedUsersList}-is array list it show values in getter/setter but in my ui is not showing