求救，这是什么错误？？加上filter后出现在的。

2010-6-20 19:57:07 org.apache.catalina.core.AprLifecycleListener init
信息: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: E:\Program Files\Java\jdk1.5.0_06\bin;E:\Program Files\Apache Software Foundation\Tomcat 6.0\bin
2010-6-20 19:57:08 org.apache.coyote.http11.Http11Protocol init
严重: Error initializing endpoint
java.net.BindException: Address already in use: JVM_Bind:8080
at org.apache.tomcat.util.net.JIoEndpoint.init(JIoEndpoint.java:501)
at org.apache.coyote.http11.Http11Protocol.init(Http11Protocol.java:177)
at org.apache.catalina.connector.Connector.initialize(Connector.java:1059)
at org.apache.catalina.core.StandardService.initialize(StandardService.java:677)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:792)
at org.apache.catalina.startup.Catalina.load(Catalina.java:518)
at org.apache.catalina.startup.Catalina.load(Catalina.java:538)
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.load(Bootstrap.java:260)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:412)
2010-6-20 19:57:08 org.apache.catalina.startup.Catalina load
严重: Catalina.start
LifecycleException:  Protocol handler initialization failed: java.net.BindException: Address already in use: JVM_Bind:8080
at org.apache.catalina.connector.Connector.initialize(Connector.java:1061)
at org.apache.catalina.core.StandardService.initialize(StandardService.java:677)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:792)
at org.apache.catalina.startup.Catalina.load(Catalina.java:518)
at org.apache.catalina.startup.Catalina.load(Catalina.java:538)
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.load(Bootstrap.java:260)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:412)
2010-6-20 19:57:08 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 966 ms
2010-6-20 19:57:08 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2010-6-20 19:57:08 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.14
2010-6-20 19:57:09 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2010-6-20 19:57:09 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
2010-6-20 19:57:09 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter SecurityFilter
java.lang.ClassCastException: myFilter.SecurityFilter
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:255)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3696)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4343)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
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:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
2010-6-20 19:57:09 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2010-6-20 19:57:09 org.apache.catalina.core.StandardContext start
严重: Context [/filter_experiment] startup failed due to previous errors
2010-6-20 19:57:09 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2010-6-20 19:57:10 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2010-6-20 19:57:10 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/47  config=null
2010-6-20 19:57:10 org.apache.catalina.startup.Catalina start
信息: Server startup in 2125 ms