Utilisation d'apacheds !

Salut,
j'ai un problème avec mon application réalisée sous eclipse ganimede et utilisant comme serveur tomcat 5.5 !!!
Je n'arrive pas à identifier mer users en utilisant l'apacheds
On m'affiche ces erreurs:

Code:

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[ERROR,ManagerBase,main] "IOException" lors du chargement des sessions persistantes: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.sun.jndi.ldap.LdapCtx
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.sun.jndi.ldap.LdapCtx
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
	at java.io.ObjectInputStream.readSerialData(Unknown Source)
	at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
	at java.io.ObjectInputStream.readSerialData(Unknown Source)
	at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.readObject(Unknown Source)
	at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1407)
	at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:931)
	at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:394)
	at org.apache.catalina.session.StandardManager.load(StandardManager.java:321)
	at org.apache.catalina.session.StandardManager.start(StandardManager.java:637)
	at org.apache.catalina.core.ContainerBase.setManager(ContainerBase.java:432)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4160)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
	at org.apache.catalina.core.StandardService.start(StandardService.java:448)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: java.io.NotSerializableException: com.sun.jndi.ldap.LdapCtx
	at java.io.ObjectOutputStream.writeObject0(Unknown Source)
	at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
	at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
	at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
	at java.io.ObjectOutputStream.writeObject0(Unknown Source)
	at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
	at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
	at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
	at java.io.ObjectOutputStream.writeObject0(Unknown Source)
	at java.io.ObjectOutputStream.writeObject(Unknown Source)
	at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1483)
	at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:948)
	at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:517)
	at org.apache.catalina.session.StandardManager.unload(StandardManager.java:463)
	at org.apache.catalina.session.StandardManager.stop(StandardManager.java:667)
	at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4360)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
	at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
	at org.apache.catalina.core.StandardService.stop(StandardService.java:510)
	at org.apache.catalina.core.StandardServer.stop(StandardServer.java:734)
	at org.apache.catalina.startup.Catalina.stop(Catalina.java:602)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:577)
	... 6 more

Code:

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[ERROR,ManagerBase,main] Exception au chargement des sessions depuis le stockage persistant (persistent storage)
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.sun.jndi.ldap.LdapCtx
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
	at java.io.ObjectInputStream.readSerialData(Unknown Source)
	at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
	at java.io.ObjectInputStream.readSerialData(Unknown Source)
	at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.readObject(Unknown Source)
	at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1407)
	at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:931)
	at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:394)
	at org.apache.catalina.session.StandardManager.load(StandardManager.java:321)
	at org.apache.catalina.session.StandardManager.start(StandardManager.java:637)
	at org.apache.catalina.core.ContainerBase.setManager(ContainerBase.java:432)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4160)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
	at org.apache.catalina.core.StandardService.start(StandardService.java:448)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: java.io.NotSerializableException: com.sun.jndi.ldap.LdapCtx
	at java.io.ObjectOutputStream.writeObject0(Unknown Source)
	at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
	at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
	at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
	at java.io.ObjectOutputStream.writeObject0(Unknown Source)
	at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
	at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
	at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
	at java.io.ObjectOutputStream.writeObject0(Unknown Source)
	at java.io.ObjectOutputStream.writeObject(Unknown Source)
	at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1483)
	at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:948)
	at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:517)
	at org.apache.catalina.session.StandardManager.unload(StandardManager.java:463)
	at org.apache.catalina.session.StandardManager.stop(StandardManager.java:667)
	at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4360)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
	at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067)
	at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448)
	at org.apache.catalina.core.StandardService.stop(StandardService.java:510)
	at org.apache.catalina.core.StandardServer.stop(StandardServer.java:734)
	at org.apache.catalina.startup.Catalina.stop(Catalina.java:602)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:577)
	... 6 more

Je ne sais pas quoi faire , Aidez moi SVP !!!