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        1. Re: <rich:simpleTogglePanel> Tag Library supports namespace: http://richfaces.org/rich, but no tag was defined for name: simpleTogglePanelroysong Nov 18, 2011 3:17 AM (in response to roysong)I tried out other two components: rich:modalPanel and rich:panelBar, the result is the same - no tag was defined. So I belive there must be a configuration issue, but I failed to resolve it by update my web.xml. The following is my web.xml, which is created by Maven 3.0.3: <?xml version="1.0" encoding="UTF-8"?> 
 <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 <display-name>Sample RichFaces 4 Application</display-name>
 <context-param>
 <param-name>javax.faces.PROJECT_STAGE</param-name>
 <param-value>Development</param-value>
 </context-param>
 <context-param>
 <param-name>javax.faces.SKIP_COMMENTS</param-name>
 <param-value>true</param-value>
 </context-param>
 <servlet>
 <servlet-name>Faces Servlet</servlet-name>
 <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
 <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
 <servlet-name>Faces Servlet</servlet-name>
 <url-pattern>*.jsf</url-pattern>
 </servlet-mapping>
 <servlet-mapping>
 <servlet-name>Faces Servlet</servlet-name>
 <url-pattern>/faces/*</url-pattern>
 </servlet-mapping>
 <session-config>
 <session-timeout>30</session-timeout>
 </session-config>
 <mime-mapping>
 <extension>ecss</extension>
 <mime-type>text/css</mime-type>
 </mime-mapping>
 <welcome-file-list>
 <welcome-file>faces/index.xhtml</welcome-file>
 </welcome-file-list>
 <login-config>
 <auth-method>BASIC</auth-method>
 </login-config>
 </web-app>Any idea? 
