I’ve found the problem !
It’s because I’ve choose “High” for the position.
Now I’ve choose “Normal” and the fields are back.
If you can change this in the plugin it will be good for other people who have the same problem 😉
PS : your plugins are awesome
PS2 : look at this if you don’t already have : http://make.wordpress.org/ui/2013/08/08/proposal-improving-the-content-editing-experience/
