Hi all; i have a little web app developed by using Cocoon 2.5.1; when i try to deploy 
it on JBoss 3.2.5 i have this error:

anonymous wrote : 17:15:08,337 ERROR [Engine] 
StandardContext[/cocoonWf]StandardWrapper.Throwable
  | java.lang.LinkageError: loader constraints violated when linking 
org/xml/sax/ErrorHandler class
  |     at org.apache.xerces.jaxp.SAXParserImpl.(Unknown Source)
  |     at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source)
  |     at 
org.apache.avalon.framework.configuration.DefaultConfigurationBuilder.(DefaultConfigurationBuilder.java:142)
  |     at 
org.apache.avalon.framework.configuration.DefaultConfigurationBuilder.(DefaultConfigurationBuilder.java:118)
  |     at org.apache.cocoon.servlet.CocoonServlet.initLogger(Unknown Source)
  |     at org.apache.cocoon.servlet.CocoonServlet.init(Unknown Source)
  |     at 
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1019)
  |     at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862)
  |     at 
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3991)
  |     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4335)
  |     at 
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
  |     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
  |     at org.apache.catalina.core.StandardHost.addChild(StandardHost.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:324)
  |     at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
  |     at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:109)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.apache.catalina.core.StandardContext.init(StandardContext.java:5412)
  |     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:324)
  |     at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
  |     at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:109)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at 
org.jboss.web.tomcat.tc5.TomcatDeployer.performDeployInternal(TomcatDeployer.java:286)
  |     at 
org.jboss.web.tomcat.tc5.TomcatDeployer.performDeploy(TomcatDeployer.java:70)
  |     at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:306)
  |     at org.jboss.web.WebModule.startModule(WebModule.java:62)
  |     at org.jboss.web.WebModule.startService(WebModule.java:40)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:271)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:221)
  |     at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at 
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:837)
  |     at $Proxy17.start(Unknown Source)
  |     at org.jboss.system.ServiceController.start(ServiceController.java:367)
  |     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy31.start(Unknown Source)
  |     at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:313)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:836)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:828)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:645)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:608)
  |     at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy7.deploy(Unknown Source)
  |     at 
org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:304)
  |     at 
org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:478)
  |     at 
org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:201)
  |     at 
org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:274)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:271)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:221)
  |     at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at 
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:837)
  |     at $Proxy0.start(Unknown Source)
  |     at org.jboss.system.ServiceController.start(ServiceController.java:367)
  |     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy4.start(Unknown Source)
  |     at org.jboss.deployment.SARDeployer.start(SARDeployer.java:251)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:836)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:645)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:608)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:592)
  |     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:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy5.deploy(Unknown Source)
  |     at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:407)
  |     at org.jboss.system.server.ServerImpl.start(ServerImpl.java:311)
  |     at org.jboss.Main.boot(Main.java:145)
  |     at org.jboss.Main$1.run(Main.java:399)
  |     at java.lang.Thread.run(Thread.java:534)
  | 17:15:08,387 ERROR [Engine] StandardContext[/cocoonWf]Servlet /cocoonWf threw 
load() exception
  | javax.servlet.ServletException: Servlet.init() for servlet Cocoon threw exception
  |     at 
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1061)
  |     at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862)
  |     at 
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3991)
  |     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4335)
  |     at 
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
  |     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
  |     at org.apache.catalina.core.StandardHost.addChild(StandardHost.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:324)
  |     at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
  |     at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:109)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.apache.catalina.core.StandardContext.init(StandardContext.java:5412)
  |     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:324)
  |     at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
  |     at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:109)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at 
org.jboss.web.tomcat.tc5.TomcatDeployer.performDeployInternal(TomcatDeployer.java:286)
  |     at 
org.jboss.web.tomcat.tc5.TomcatDeployer.performDeploy(TomcatDeployer.java:70)
  |     at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:306)
  |     at org.jboss.web.WebModule.startModule(WebModule.java:62)
  |     at org.jboss.web.WebModule.startService(WebModule.java:40)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:271)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:221)
  |     at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at 
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:837)
  |     at $Proxy17.start(Unknown Source)
  |     at org.jboss.system.ServiceController.start(ServiceController.java:367)
  |     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy31.start(Unknown Source)
  |     at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:313)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:836)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:828)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:645)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:608)
  |     at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy7.deploy(Unknown Source)
  |     at 
org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:304)
  |     at 
org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:478)
  |     at 
org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:201)
  |     at 
org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:274)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:271)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:221)
  |     at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at 
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:837)
  |     at $Proxy0.start(Unknown Source)
  |     at org.jboss.system.ServiceController.start(ServiceController.java:367)
  |     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy4.start(Unknown Source)
  |     at org.jboss.deployment.SARDeployer.start(SARDeployer.java:251)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:836)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:645)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:608)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:592)
  |     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:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy5.deploy(Unknown Source)
  |     at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:407)
  |     at org.jboss.system.server.ServerImpl.start(ServerImpl.java:311)
  |     at org.jboss.Main.boot(Main.java:145)
  |     at org.jboss.Main$1.run(Main.java:399)
  |     at java.lang.Thread.run(Thread.java:534)
  | 17:15:08,397 ERROR [Engine] ----- Root Cause -----
  | java.lang.LinkageError: loader constraints violated when linking 
org/xml/sax/ErrorHandler class
  |     at org.apache.xerces.jaxp.SAXParserImpl.(Unknown Source)
  |     at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source)
  |     at 
org.apache.avalon.framework.configuration.DefaultConfigurationBuilder.(DefaultConfigurationBuilder.java:142)
  |     at 
org.apache.avalon.framework.configuration.DefaultConfigurationBuilder.(DefaultConfigurationBuilder.java:118)
  |     at org.apache.cocoon.servlet.CocoonServlet.initLogger(Unknown Source)
  |     at org.apache.cocoon.servlet.CocoonServlet.init(Unknown Source)
  |     at 
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1019)
  |     at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862)
  |     at 
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3991)
  |     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4335)
  |     at 
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
  |     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
  |     at org.apache.catalina.core.StandardHost.addChild(StandardHost.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:324)
  |     at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
  |     at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:109)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.apache.catalina.core.StandardContext.init(StandardContext.java:5412)
  |     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:324)
  |     at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
  |     at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:109)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at 
org.jboss.web.tomcat.tc5.TomcatDeployer.performDeployInternal(TomcatDeployer.java:286)
  |     at 
org.jboss.web.tomcat.tc5.TomcatDeployer.performDeploy(TomcatDeployer.java:70)
  |     at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:306)
  |     at org.jboss.web.WebModule.startModule(WebModule.java:62)
  |     at org.jboss.web.WebModule.startService(WebModule.java:40)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:271)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:221)
  |     at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at 
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:837)
  |     at $Proxy17.start(Unknown Source)
  |     at org.jboss.system.ServiceController.start(ServiceController.java:367)
  |     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy31.start(Unknown Source)
  |     at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:313)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:836)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:828)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:645)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:608)
  |     at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy7.deploy(Unknown Source)
  |     at 
org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:304)
  |     at 
org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:478)
  |     at 
org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:201)
  |     at 
org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:274)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:271)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:221)
  |     at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at 
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:837)
  |     at $Proxy0.start(Unknown Source)
  |     at org.jboss.system.ServiceController.start(ServiceController.java:367)
  |     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy4.start(Unknown Source)
  |     at org.jboss.deployment.SARDeployer.start(SARDeployer.java:251)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:836)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:645)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:608)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:592)
  |     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:324)
  |     at 
org.jboss.mx.server.ReflectedDispatcher.dispatch(ReflectedDispatcher.java:60)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:61)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:53)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:185)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:473)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy5.deploy(Unknown Source)
  |     at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:407)
  |     at org.jboss.system.server.ServerImpl.start(ServerImpl.java:311)
  |     at org.jboss.Main.boot(Main.java:145)
  |     at org.jboss.Main$1.run(Main.java:399)
  |     at java.lang.Thread.run(Thread.java:534)
  | 17:15:08,517 INFO  [EARDeployer] Started J2EE application: 
file:/C:/jboss-3.2.5/server/default/deploy/DemoWfmOpenCocoon.ear

Do you know why?

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http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3854086#3854086

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