runnig clif examples

[mehdi.kessis@xxxxxxxxxxxxx]

Hi everybody
I am trying to run clif examples but I have some class not found exceptions!!
is it normal  ?
server:

     [java] Server XXX.fr is ready.
     [java] WARNING: java.lang.ClassNotFoundException: 
org.objectweb.clif.storag
e.api.StorageWriteService
     [java] WARNING: java.lang.ClassNotFoundException: 
org.objectweb.clif.storag
e.api.StorageProxyAdmin
     [java] p0.3 Exception java.lang.ClassNotFoundException: 
org.objectweb.clif.
storage.api.StorageWriteService
al ?

and 
console:
     [java] Fractal registry is ready.
     [java] {XXX.fr=Injector and Probe deployment...}
     [java] org.objectweb.fractal.rmi.RemoteException: server side exception: 
ja                                  va.lang.ClassNotFoundException: 
org.objectweb.clif.storage.api.StorageWriteServi                              
    ce
     [java]     at 
org.objectweb.fractal.api.factory.GenericFactory_Stub.newFcIn                 
                 stance(Unknown Source)
     [java]     at 
org.objectweb.clif.console.api.ClifServerReference.<init>(Cli                 
                 fServerReference.java:111)
     [java]

Regards