diff --git a/lodel/auth/client.py b/lodel/auth/client.py
index b505ebb..5f6fc59 100644
--- a/lodel/auth/client.py
+++ b/lodel/auth/client.py
@@ -160,8 +160,11 @@ class Client(object, metaclass = ClientMetaclass):
         if cls._instance.__session_token is not None:
             raise ClientAuthenticationError("Trying to restore a session, but \
 a session is allready started !!!")
-        cls._instance.__datas = SessionHandler.restore(token)
-        cls._instance.__session_token = token
+        try:
+            cls._instance.__datas = SessionHandler.restore(token)
+            cls._instance.__session_token = token
+        except ClientAuthenticationFailure:
+            logger.warning("Session restoring fails")
         return copy.copy(cls._instance.datas)
     
     ##@brief Return the current session token or None
diff --git a/plugins/webui/run.py b/plugins/webui/run.py
index 6b5fa8e..cd9258d 100644
--- a/plugins/webui/run.py
+++ b/plugins/webui/run.py
@@ -71,13 +71,9 @@ def application(env, start_response):
         #to log messages with client infos
         client = WebUiClient(env['REMOTE_ADDR'], env['HTTP_USER_AGENT'], None)
         session_token = load_cookie(request)
-        if session_token is not None:
+        if session_token is not None and len(session_token) > 0:
             WebUiClient.restore_session(session_token)
-            #next line is for testing purpose
-            print("ACCESS DATAS : ", WebUiClient['last_request'])
         session_token = None
-        #next line is for testing purpose
-        WebUiClient['last_request'] = time.time()
         
         try:
             controller = get_controller(request)