Tomcat e JSf

[b]Boa noite, Eu peguei um tutorial de JSF aqui mesmo no GUJ que disse para baixar o JSF1.1.zip e testar um dos exemplos do diretório samples no tomcat.
Só que está dando erro e eu não sei porque, eu tento acessar qualquer um dos .WAR que eu coloquei no webapps e ele dá esse erro:

HTTP 500:
[/code]type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 55
52:
53: -->
54:
55:
56:
57:

org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:555)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:414)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause

javax.servlet.ServletException: Servlet.init() for servlet Faces Servlet threw exception
org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:699)
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:670)
org.apache.jsp.index_jsp._jspService(index_jsp.java:108)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:390)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause

java.lang.NullPointerException
javax.faces.webapp.FacesServlet.init(FacesServlet.java:144)
org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:699)
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:670)
org.apache.jsp.index_jsp._jspService(index_jsp.java:108)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:390)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.7 logs.
Apache Tomcat/6.0.7[code]

Alguém pode me ajudar?