cryptsetup/kcryptd does not work?!

[variable <variable@riseup.net>]

Hey there,
i guess my harddisk encryption works not properly. i installed etch with
kernel 2.6.18 and the package cryptsetup on my 600mhz pIII.
for crypting one of my partitions i did:

cryptsetup -y -c aes-cbc-essiv:sha256 luksFormat test /dev/hdd1
cryptsetup luksOpen /dev/hdd1 test
mkfs.ext3 /dev/mapper/test
mount /dev/mapper/test /mnt/wurstbrot

the problem now is, that nothing happens with the process kcrypt when i
copy files to that 'encrypted' partition.
so i can copy files but i'm not sure that the files on that partion are
encrypted.

any suggestions what to do with that??

thanks,
variable