I tried what I understood from the forum and added this "printer" but without success.
What is strange and that I have apparently access to my saveguards from Time Machien but I cannot saveguard anything new. And I have no access to the Link Station form the network.
Since I am a very poor computer / network man I do not understand why apparently there is now an AFP problem.
In fact the message that's appear trying to safeguard with Time Machine is:
Le disque de sauvegarde réseau ne prend pas en charge les fonctionnalités AFP requises.
I could translate this by:
The Network Safeguard Disk does not take into account the required AFP functionality.
What does it mean ?
How to solve that.