RichFaces 4: The form component needs to have a UIForm in its ancestry

Front-end
#1 
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:c="http://java.sun.com/jsp/jstl/core"
      xmlns:rich="http://richfaces.org/rich">

    <h:head>
        <title>Richfaces Tables</title>
    </h:head>

    <f:view contentType="text/html">

    <h:body>
        <h:form id="form1" target="">
            <rich:tabPanel>
                <rich:tab header="First">
                    Here is tab #1
                </rich:tab>
                <rich:tab header="Second">
                    Here is tab #2
                </rich:tab>
                <rich:tab header="Third">
                    Here is tab #3
                </rich:tab>
            </rich:tabPanel>

        </h:form>
    </h:body>
        
        </f:view>
</html>

Já fiz de tudo estou iniciando esta semana com o richFaces mas poque aparece este aviso na minha página?

The form component needs to have a UIForm in its ancestry. Suggestion: enclose the necessary components within <h:form>

#2