java - Unsupported Exception in jsf 2.0 + springwebflow 2.0

I started to create a project using the following technologies

JSF 2.0 
Springwebflow 2.0

Primefaces 2.2.1
Richfaces 3.3
Appserver : JBOSS-AS-7.1.1 Final

My application got deployed successfully, but when i am trying to run it.. i am getting the following exception,

exception

org.springframework.web.util.NestedServletException: Request
processing failed; nested exception is
org.springframework.webflow.execution.FlowExecutionException:
Exception thrown in state 'startPage' of flow 'main'
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:583)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)

org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

root cause

org.springframework.webflow.execution.FlowExecutionException:
Exception thrown in state 'startPage' of flow 'main'
org.springframework.webflow.engine.impl.FlowExecutionImpl.wrap(FlowExecutionImpl.java:569)

org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:263)
org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:163)
org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183)
org.springframework.webflow.mvc.servlet.FlowController.handleRequest(FlowController.java:174)
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
javax.servlet.http.HttpServlet.service(HttpServlet.java:734)

javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

root cause

java.lang.UnsupportedOperationException
javax.faces.context.ExternalContext.getResponseOutputWriter(ExternalContext.java:1228)
com.sun.faces.application.view.JspViewHandlingStrategy.renderView(JspViewHandlingStrategy.java:206)
com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:125)
org.springframework.faces.webflow.FlowViewHandler.renderView(FlowViewHandler.java:91)
org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
org.springframework.faces.webflow.JsfView.render(JsfView.java:88)
org.springframework.webflow.engine.ViewState.render(ViewState.java:282)
org.springframework.webflow.engine.ViewState.refresh(ViewState.java:241)

org.springframework.webflow.engine.ViewState.resume(ViewState.java:219)
org.springframework.webflow.engine.Flow.resume(Flow.java:545)
org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:259)
org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:163)
org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183)
org.springframework.webflow.mvc.servlet.FlowController.handleRequest(FlowController.java:174)
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)

org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

Any Idea what the cause is ?

my faces-config.xml



    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-facesconfig_2_0.xsd"
    version="2.0">



my web.xml


    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd"
    version="2.5">

    
        contextConfigLocation
        
            /WEB-INF/config/web-application-config.xml
        
    


    
        org.springframework.web.context.ContextLoaderListener
    

    
    
    
        javax.faces.DEFAULT_SUFFIX

        .xhtml
    

    
    
        javax.faces.PROJECT_STAGE
        Development
    

    

        facelets.DEVELOPMENT
        true
    
    
    
        facelets.REFRESH_PERIOD
        1
    
    
    

        Faces Servlet
        javax.faces.webapp.FacesServlet
        1
    
    
    
        Faces Servlet
        *.faces
    


    
     javax.faces.DISABLE_FACELET_JSF_VIEWHANDLER
     true
    

    
        charEncodingFilter
        org.springframework.web.filter.CharacterEncodingFilter
        
            encoding

            UTF-8
        
        
            forceEncoding
            true
        
    

    
        charEncodingFilter

        /*
    



    
        Resources Servlet
        org.springframework.js.resource.ResourceServlet
        0
    


    
        Resources Servlet
        /resources/*
    

    
    

        Spring MVC Dispatcher Servlet
        org.springframework.web.servlet.DispatcherServlet
        
            contextConfigLocation
            
        
        2
    

    

        Spring MVC Dispatcher Servlet
        /spring/*
    


    
        
            javax.servlet.jsp.jstl.fmt.localizationContext
        
        resources.application

    

    
        index.html
    



my webflow-config.xml



       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:webflow="http://www.springframework.org/schema/webflow-config"
       xmlns:faces="http://www.springframework.org/schema/faces"
       xsi:schemaLocation="
           http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
           http://www.springframework.org/schema/webflow-config
           http://www.springframework.org/schema/webflow-config/spring-webflow-config-2.3.xsd

           http://www.springframework.org/schema/faces
           http://www.springframework.org/schema/faces/spring-faces-2.0.xsd">