Hello, The problem I have reported yesterday is gone when using this new version. I have now one card connected at 100MB/FD to a switch while the other is connected at 10MB/HD to a hub. Thank you again for your help. Tru -- CEA Centre d'etudes de Saclay 91191 Gif sur Yvette CEDEX FRANCE DSM/DRECAM/SCM | DSV/DBCM/SBPM Bat 137 piece 107 | Bat 528 piece 215 thuynh@cea.fr