UEFI+LVM+LUKS

Hello to all,
After installing my client, the client doesn't boot on ubuntu but on BusyBox. 
I think that it can't decrypt the disk during the boot.
I use this type of partition:
# <type> <mountpoint> <size> <fs type> <mount options> <misc options>.

# whole disk with LVM, separate /home

disk_config disk1 disklabel:msdos bootable:2 fstabkey:uuid
primary /boot 200M ext4 rw,noatime
primary /boot/efi 100M vfat rw
primary - 200M- - -

disk_config cryptsetup
luks: "IJCLAB019" - disk1.3 - -

disk_config lvm
vg vg1 disk1.3
vg1-root / 100G ext4 rw,noatime,errors=remount-ro
vg1-swap swap 16G swap defaults
vg1-home /home 100- ext4 rw,noatime

I have already installed all the necessary cryptsetup packages: crypsetup, cryptsetup-run and cryptsetup-initriamfs.
Can anyone help me please?

Kind regards,
--------------------------------------- 
Bruno FERREIRA PINTO    TEL:0164468580
Service Informatique
IJCLab
IN2P3/CNRS
Universite Paris-Sud 11
Rue André Ampere Bt 100A Pce A118
91898 Orsay Cédex
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