部署程序发生异常

在was6.1上部署程序发生异常，请大家帮忙看看。谢啦！！
Version 6.0.689 Started
[11-10-26 15:00:41:859 CST] 00000020 ServletWrappe I   SRVE0242I: [IST1104Proj_war] [/] [ChartServlet]: 初始化成功。
[11-10-26 15:00:41:859 CST] 00000020 VirtualHost   I   SRVE0250I: Web 模块 已绑定到 default_host[*:9080,*:80,*:9443,*:5060,*:5061,*:443]。
[11-10-26 15:00:41:859 CST] 00000020 ApplicationMg A   WSVR0221I: 应用程序已启动：IST1104Proj_war
[11-10-26 15:00:46:937 CST] 0000002f WebApp        E   [Servlet Error]-[com.ibm.ws.wswebcontainer.extension.DefaultExtensionProcessor incompatible with com.ibm.wsspi.webcontainer.servlet.IServletWrapper]: java.lang.ClassCastException: com.ibm.ws.wswebcontainer.extension.DefaultExtensionProcessor incompatible with com.ibm.wsspi.webcontainer.servlet.IServletWrapper
at com.ibm.ws.webcontainer.extension.DefaultExtensionProcessor.handleRequest(DefaultExtensionProcessor.java:499)
at com.ibm.ws.wswebcontainer.extension.DefaultExtensionProcessor.handleRequest(DefaultExtensionProcessor.java:111)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3107)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:238)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:811)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1425)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:92)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:394)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:274)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:152)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:213)
at com.ibm.io.async.AbstractAsyncFuture.fireCompletionActions(AbstractAsyncFuture.java:195)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:193)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:725)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:847)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1498)