Erro em JSF...onde abaixar richfaces

Front-end
#1

Olá pessoal,

estou tentando rodar um exemplo usando JSF
e está me dando erro :


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

erro :Severity and Description Path Resource Location Creation Time Id
Cannot find the tag library descriptor for http://richfaces.org/rich JavaMagazineDragAndDrop/WebContent selecaoCursos.jsp line 7 1196854787723 2155

Severity and Description Path Resource Location Creation Time Id
Cannot find the tag library descriptor for http://richfaces.org/a4j JavaMagazineDragAndDrop/WebContent selecaoCursos.jsp line 6 1196854787723 2154

e tb esse :

public class CursosMB implements DropListener {

erro :

DropListener cannot be resolved a type

Se alguém puder me ajudar agradeceria…

abs

#2

https://www.redhat.com/apps/WebForm/richfaces_demo.html

#3