Hi,
Additional info :
at admin console: Secure administration, applications, and infrastructure > Authentication mechanisms and expiration using LTPA mechanism.
We used the existing key Generated from WAS 5.0 and import into WAS 6.1. Lotus Domino server still using existing key generated from WAS 5.0.

[4/26/07 17:04:05:093 SGT] 00000083 WebContainer E SRVE0232E: Internal Server Error.
Exception Message: [javax.servlet.ServletException: Filter [SessionTimeOut]: filter is unavailable.
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapp er.doFilter(FilterInstanceWrapper.java:233)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._ doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:761)
at com.ibm.ws.webcontainer.webapp.WebApp.invokeFilter s(WebApp.java:3239)
at com.ibm.ws.wswebcontainer.webapp.WebApp.invokeFilt ers(WebApp.java:351)
at com.ibm.ws.webcontainer.webapp.WebApp.handleReques t(WebApp.java:3150)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequ est(WebGroup.java:254)
at com.ibm.ws.webcontainer.WebContainer.handleRequest (WebContainer.java:811)
at com.ibm.ws.wswebcontainer.WebContainer.handleReque st(WebContainer.java:1433)
at com.ibm.ws.webcontainer.channel.WCChannelLink.read y(WCChannelLink.java:111)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleDiscrimination(HttpInboundLink.java:454)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleNewInformation(HttpInboundLink.java:383)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCa llback.complete(HttpICLReadCallback.java:102)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListe ner.futureCompleted(AioReadCompletionListener.java :165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallbac k(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletion Actions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture .java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHand ler.java:195)
at com.ibm.io.async.ResultHandler.runEventProcessingL oop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler .java:873)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.j ava:1469)
---- Begin backtrace for Nested Throwables
java.lang.NullPointerException
at my.com.cgu.genlink.common.filter.SessionTimeOutFil ter.isSessionFreePath(SessionTimeOutFilter.java:11 4)
at my.com.cgu.genlink.common.filter.SessionTimeOutFil ter.doFilter(SessionTimeOutFilter.java:94)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapp er.doFilter(FilterInstanceWrapper.java:186)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._ doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:761)
at com.ibm.ws.webcontainer.webapp.WebApp.invokeFilter s(WebApp.java:3239)
at com.ibm.ws.wswebcontainer.webapp.WebApp.invokeFilt ers(WebApp.java:351)
at com.ibm.ws.webcontainer.webapp.WebApp.handleReques t(WebApp.java:3150)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequ est(WebGroup.java:254)
at com.ibm.ws.webcontainer.WebContainer.handleRequest (WebContainer.java:811)
at com.ibm.ws.wswebcontainer.WebContainer.handleReque st(WebContainer.java:1433)
at com.ibm.ws.webcontainer.channel.WCChannelLink.read y(WCChannelLink.java:111)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleDiscrimination(HttpInboundLink.java:454)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleNewInformation(HttpInboundLink.java:383)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCa llback.complete(HttpICLReadCallback.java:102)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListe ner.futureCompleted(AioReadCompletionListener.java :165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallbac k(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletion Actions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture .java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHand ler.java:195)
at com.ibm.io.async.ResultHandler.runEventProcessingL oop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler .java:873)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.j ava:1469)
]
[4/26/07 17:04:13:015 SGT] 00000088 ServletWrappe I SRVE0242I: [isclite] [/ibm/console] [/logon.jsp]: Initialization successful.