LVM2 logical volumes on Loop-AES

Hello

I would like to encrypt most of my file server.  To do this I thought I
would place logical volumes on top of loop-aes.  This is where I've got
to:
#losetup -K /mnt/keys/keyfile.gpg /dev/loop3 /dev/hda6
#pvcreate /dev/loop3
Physical volume "/dev/loop3" successfully created
#vgcreate vg /dev/loop3
 Found duplicate PV SO5CgPDJuTwi8LFh7x7N4qqCaEU70hJ9: using /dev/hda6
not /dev/loop3 Found duplicate PV SO5CgPDJuTwi8LFh7x7N4qqCaEU70hJ9:
using /dev/loop3 not /dev/hda6 Found duplicate PV
SO5CgPDJuTwi8LFh7x7N4qqCaEU70hJ9: using /dev/hda6 not /dev/loop3 Found
duplicate PV SO5CgPDJuTwi8LFh7x7N4qqCaEU70hJ9: using /dev/loop3
not /dev/hda6 Volume group "vg" successfully created

Well, that looks ugly to me.  There is something I'm not doing
correctly here.  I know this is a vague question but, do you have any
pointers as to whether and how LVM2 logical volumes should be
established on loop-aes loop devices?

Thanks for reading.

Regards

Fog_Watch.
-- 
Lose wait.  Get Gentoo.

-
Linux-crypto:  cryptography in and on the Linux system
Archive:       http://mail.nl.linux.org/linux-crypto/