Error in Apache Tomcat even after adding Specific library

Hi Guys
Thanks a ton to you in advance. I really am trying to debug this. I saw this error adn added displaytag.jar library since it gave classnotfound exception for this. But still , I’m getting the same error. I’m using Apache tomcat on eclipse…

Thanks again guys… Here’s the server logs…

Sep 11, 2012 9:43:18 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.6.0_31\jre\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Program Files/Java/jre7/bin/client;C:/Program Files/Java/jre7/bin;C:/Program Files/Java/jre7/lib/i386;C:\oracle\product\11.2.0\client_1\bin;C:\Oracle\product\10.1.0\Client_1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\Microsoft Application Virtualization Client;C:\Program Files\Common Files\Ulead Systems\MPEG;C:\Program Files\Enterprise Vault\EVClient\;C:\ORACLE\ORA92\bin\;C:\Program Files\Oracle\jre\1.3.1\bin\;C:\Program Files\Oracle\jre\1.1.8\bin\;jre\1.1.8\bin;C:\Users\c108872\.vmwebclient\Java\bin;C:\eclipse-jee-indigo-SR2-win32\eclipse;;.
Sep 11, 2012 9:43:18 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property ‘source’ to ‘org.eclipse.jst.j2ee.server:DataStewardshipWeb’ did not find a matching property.
Sep 11, 2012 9:43:18 AM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
Sep 11, 2012 9:43:18 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 391 ms
Sep 11, 2012 9:43:18 AM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Sep 11, 2012 9:43:18 AM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.35
Sep 11, 2012 9:43:19 AM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter ResponseOverrideFilter
java.lang.ClassNotFoundException: org.displaytag.filter.ResponseOverrideFilter
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:269)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4072)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4726)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
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:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Sep 11, 2012 9:43:19 AM org.apache.catalina.core.StandardContext start
SEVERE: Error filterStart
Sep 11, 2012 9:43:19 AM org.apache.catalina.core.StandardContext start
SEVERE: Context [/DataStewardshipWeb] startup failed due to previous errors
Sep 11, 2012 9:43:19 AM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Sep 11, 2012 9:43:19 AM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Sep 11, 2012 9:43:19 AM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/21 config=null
Sep 11, 2012 9:43:19 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 302 ms