There seems to be a bug, because I get:
modprobe aes dm_mod dm-crypt sha256
WARNING: Error inserting aes_generic (/lib/modules/2.6.25.16-108/kernel/crypto/aes_generic.ko): Unknown symbol in module, or unknown parameter (see dmesg)
WARNING: Error inserting padlock_aes (/lib/modules/2.6.25.16-108/kernel/drivers/crypto/padlock-aes.ko): Unknown symbol in module, or unknown parameter (see dmesg)
WARNING: Error inserting aes_i586 (/lib/modules/2.6.25.16-108/kernel/arch/x86/crypto/aes-i586.ko): Unknown symbol in module, or unknown parameter (see dmesg)
And I cannot try anymore, because my drive lierally crashed this evening!!! Just a drop from 50 centimeters height, but it doesn't react anymore... so sad