Password crash for Caelinux 2013

Hello all,

I just installed caelinux 2013 on my laptop 64bits core I7 from Live DVD in french and when user profile asked for the password I enter a personal password. I kept caelinux as user. and the install process finished normally . The problem comes when I tried to start with my password. Login rejected all my tentaives to enter my password: with french or uskeyboard and all different manners.
So I search for caelinux terminal in order to found a solution but I get only the GRUB terminal which is different. So I cannot use sudo command.
Please is there some good friend to show me the way to solve this frustrating problem ?
Thanks for your attention
Claude

Looking into Xubuntu I discovered that Grub could be the solution. In GRUB Recovery mode I introduce twice a new password using caelinux as user but an error message is comming: "authentication token manipulation error". I cannot identify which error it is ?
Desesperate guy
Claude