Ajax4jsf+jsf+jboss portal 问题

[jackyluck]

我用Ajax4jsf+jsf+jboss portal常试做一个简单的功能,之前用jsf+jboss portal是没有问题,后来加了
Ajax4jsf就出现问题了,当我按commit button时报错
:Reqest error,status:404 Not Found Message:undefined
请高手帮我解决
下面是我的代码:
JSP面页: <f:view>
<a4j:page>
<h:form>
<table align="center">
<tr>
<td align="center">
<h:outputLabel value="The Winning Number is:"/>
<h:dataTable id="showDataTable"value="#{Drawing.winTickets}" var="winTickets">
<h:column>
<f:facet name="headSecurityNumber">
<h:outputText id="SecurityNumber" value="SecurityNumber"/>
</f:facet>
<h:outputText id="encodedNumber" value="#{winTickets.encodedNumber}"/> </h:column>
</h:dataTable>
</td>
</tr>
<tr>
<td align="center">
<h:commandButton id="drawing" value="Do Drawing!" >
<a4j:support event="onclick" action="#{Drawing.doDrawing}" reRender="encodedNumber"/>
</h:commandButton> </td>
</tr>
</table>
</h:form>
</a4j:page>
</f:view>
Web.xml:
<context-param>
<param-name>com.sun.faces.verifyObjects</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>com.sun.faces.validateXml</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</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>/faces/*</url-pattern>
</servlet-mapping>

<filter>
<display-name>Ajax4jsf Filter</display-name>
<filter-name>ajax4jsf</filter-name>
<filter-class>org.ajax4jsf.Filter</filter-class>
</filter>
<filter-mapping>
<filter-name>ajax4jsf</filter-name>
<servlet-name>Faces Servlet</servlet-name>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
</filter-mapping>
已加了要用的ajax4jsf jar 了

[wu_07]

 <h:commandButton   id= "drawing "     value= "Do   Drawing! "   action= "#{Drawing.doDrawing} "  > 
                                                <a4j:support   event= "onclick "      reRender= "encodedNumber "/> 
                                        </h:commandButton>