I found it !
For people who want to know how I did to “unlock” my phone (My password didn’t work anymore), I did an extreme option with Google. I erased all data with the android device manager by choosing the option “erase all”. Because of this option, my phone was reboot as if I just bought it. I don’t know if it’s clear.
But careful, this option erase ALL your data : settings, images, musics, contacts and so-on.
How I did :
Google Accout
"android device manager"
FP2
"Erase all"
And voilà, my phone is all “new” and unlock.
You can close the topic, thanks.