struts:plug-in加载错误

请强人协助（急）：我在struts配置文件中加载<plug-in className="net.sf.struts.saif.SAIFSpringPlugin">的时候抛错。错误信息如下：2010-01-06 14:31:39,218 INFO  [net.sf.struts.saif.SAIFSpringPlugin] Loading the saif request processor without Tiles s
port
2010-01-06 14:31:39,234 FATAL [org.apache.struts.tiles.TilesPlugin] TilesPlugin : Specified RequestProcessor not compa
ble with TilesRequestProcessor
2010-01-06 14:31:39,234 ERROR [org.apache.struts.action.ActionServlet] Unable to initialize Struts ActionServlet due t
an unexpected exception or error thrown, so ing the servlet as unavailable.  Most likely, this is due to an incorr
t or missing library dependency.
javax.servlet.ServletException: TilesPlugin : Specified RequestProcessor not compatible with TilesRequestProcessor
        at org.apache.struts.tiles.TilesPlugin.initRequestProcessorClass(TilesPlugin.java:372)
        at org.apache.struts.tiles.TilesPlugin.init(TilesPlugin.java:133)
        at org.apache.struts.action.ActionServlet.initModulePlugIns(ActionServlet.java:869)
        at org.apache.struts.action.ActionServlet.init(ActionServlet.java:336)
        at javax.servlet.GenericServlet.init(GenericServlet.java:212)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
        at org.apache.catalina.core.StandardService.start(StandardService.java:448)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
2010-01-06 14:31:39,312 INFO  [org.apache.catalina.core.ApplicationContext] Marking servlet action as unavailable
2010-01-06 14:31:39,312 ERROR [org.apache.catalina.core.StandardContext] Servlet /BIOP threw load() exception
javax.servlet.UnavailableException: TilesPlugin : Specified RequestProcessor not compatible with TilesRequestProcessor
        at org.apache.struts.action.ActionServlet.init(ActionServlet.java:368)
        at javax.servlet.GenericServlet.init(GenericServlet.java:212)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
        at org.apache.catalina.core.StandardService.start(StandardService.java:448)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
2010-01-06 14:31:39,406 INFO  [org.apache.catalina.core.ApplicationContext] Initializing Spring FrameworkServlet 'remo
ng'