Thanks a lot Peter.
After a few months I am back on this, and I managed to connect it.
That is awesome.
Thank you guys, and Mathieu Chamagne !
But about connexions :
1 Create Wifi Ad-Hoc Network on your computer, with no security.
2 Connect your iDevice to the same network.
3 In the patcher MMF-Fantastick.maxhelp you will find in ''Connexion to iPhone...'' and ''what-is-my-IP address'' your computer bonjour name. (I guess there is a faster way here, but it works).
4 Enter this name in the Fantastick settings in the iPad settings.
5 Restart Fantastick (a restart of Max may help).
6 Open MMF-Fantastick.maxhelp
7 Load an example patch in the umenu.