Duvida sobre Erro no Struts

e ai pessoal blz, estou tentando criar um exemplo bem básico do Struts, só que quando eu mando rodar da esse erro:

type Exception report

message 

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

exception 

javax.servlet.ServletException: Cannot retrieve mapping for action /cadastroCliente
	org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:848)
	org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
	org.apache.jsp.pages.cadastroCliente_jsp._jspService(cadastroCliente_jsp.java:102)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause 

javax.servlet.jsp.JspException: Cannot retrieve mapping for action /cadastroCliente
	org.apache.struts.taglib.html.FormTag.lookup(FormTag.java:759)
	org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:443)
	org.apache.jsp.pages.cadastroCliente_jsp._jspx_meth_html_form_0(cadastroCliente_jsp.java:171)
	org.apache.jsp.pages.cadastroCliente_jsp._jspService(cadastroCliente_jsp.java:92)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.11 logs.

Se alguém puder me dar uma ajuda sobre oq este erro significa eu agradeço,
valeu pela ajuda