Na hora de rodar Struts... erro

Estou fazendo um projeto usando Struts e Hibernate… e quando vou rodar ele no Tomcat, se eu clicar em alguma página jsp, dá o seguinte erro:

"javax.servlet.ServletException: Cannot find ActionMappings or ActionFormBeans collection

at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:495)

at org.apache.jsp.login_jsp._jspService(login_jsp.java:85)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:92)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)

…"

e em "root cause"

root cause

javax.servlet.jsp.JspException: Cannot find ActionMappings or ActionFormBeans collection

at org.apache.struts.taglib.html.FormTag.lookup(FormTag.java:798)

at org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:506)

at org.apache.jsp.login_jsp._jspx_meth_html_form_0(login_jsp.java:114)

at org.apache.jsp.login_jsp._jspService(login_jsp.java:76)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:92)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:162)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)

…