Erro ao chamar uma action no WebWork

Ao chamar a action acontece o seguinte erro

meu xwork.xml

meu web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app  xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" id="WebApp_ID" version="2.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
	<display-name>
	prjaulas</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	
	<servlet>
		<servlet-name>webwork</servlet-name>
		<servlet-class>com.opensymphony.webwork.dispatcher.ServletDispatcher</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	
	<servlet-mapping>
		<servlet-name>webwork</servlet-name>
		<url-pattern>*.action</url-pattern>
	</servlet-mapping>
	
	<jsp-config>
		<taglib>
			<taglib-uri>webwork</taglib-uri>
			<taglib-location>/WEB-INF/lib/webwork-2.2.6.jar</taglib-location>
		</taglib>
	 </jsp-config>
	
</web-app>

O que eu configurei de errado? Estou usando um exemplo do Marcelo Martins

Alguém?

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