cannot restore backup made with deja dup

I made backups (full and incremental) with the aid of Deja Dup.
My disk with the original data crashed and now i want to restore the data to a new drive with different drive name i installed on my computer.
Deja Dup is not able however to find the backup data.
When i use duplicity in the terminal it fails with the following text:

leen@ubuntu:~$ duplicity restore file://media/HDDRIVE2GO/"backup digitaal archief" home/leen/

GnuPG passphrase:

Local and Remote metadata are synchronized, no sync needed.

Last full backup date: none

Traceback (most recent call last):

  File "/usr/bin/duplicity", line 1262, in <module>

    with_tempdir(main)

  File "/usr/bin/duplicity", line 1255, in with_tempdir

    fn()

  File "/usr/bin/duplicity", line 1209, in main

    restore(col_stats)

  File "/usr/bin/duplicity", line 539, in restore

    restore_get_patched_rop_iter(col_stats)):

  File "/usr/bin/duplicity", line 561, in restore_get_patched_rop_iter

    backup_chain = col_stats.get_backup_chain_at_time(time)

  File "/usr/lib/python2.7/dist-packages/duplicity/collections.py", line 934, in get_backup_chain_at_time

    raise CollectionsError("No backup chains found")

CollectionsError: No backup chains found

The backup files are on an external drive named Hddrive2GO in a directory named /backup digitaal achief.
This is the list of files in that directory

duplicity-full.20110411T142321Z.manifest.gpg

duplicity-full.20110411T142321Z.vol10.difftar.gpg

duplicity-full.20110411T142321Z.vol11.difftar.gpg

duplicity-full.20110411T142321Z.vol12.difftar.gpg

duplicity-full.20110411T142321Z.vol13.difftar.gpg

duplicity-full.20110411T142321Z.vol14.difftar.gpg

duplicity-full.20110411T142321Z.vol15.difftar.gpg

duplicity-full.20110411T142321Z.vol16.difftar.gpg

duplicity-full.20110411T142321Z.vol17.difftar.gpg

duplicity-full.20110411T142321Z.vol18.difftar.gpg

duplicity-full.20110411T142321Z.vol1.difftar.gpg

duplicity-full.20110411T142321Z.vol2.difftar.gpg

duplicity-full.20110411T142321Z.vol3.difftar.gpg

duplicity-full.20110411T142321Z.vol4.difftar.gpg

duplicity-full.20110411T142321Z.vol5.difftar.gpg

duplicity-full.20110411T142321Z.vol6.difftar.gpg

duplicity-full.20110411T142321Z.vol7.difftar.gpg

duplicity-full.20110411T142321Z.vol8.difftar.gpg

duplicity-full.20110411T142321Z.vol9.difftar.gpg

duplicity-full-signatures.20110411T142321Z.sigtar.gpg

duplicity-inc.20110411T142321Z.to.20110424T185245Z.manifest.gpg

duplicity-inc.20110411T142321Z.to.20110424T185245Z.vol1.difftar.gpg

duplicity-inc.20110411T142321Z.to.20110424T185245Z.vol2.difftar.gpg

duplicity-inc.20110411T142321Z.to.20110424T185245Z.vol3.difftar.gpg

duplicity-inc.20110411T142321Z.to.20110424T185245Z.vol4.difftar.gpg

duplicity-inc.20110411T142321Z.to.20110424T185245Z.vol5.difftar.gpg

duplicity-new-signatures.20110411T142321Z.to.20110424T185245Z.sigtar.gpg

list.txt

I use Ubuntu 11.04

How can i restore the files properly?
I also tried to list the files in the achives using "duplicity list-current-files" but i get the same answer:
leen@ubuntu:/media/HDDRIVE2GO/backup digitaal archief$ duplicity list-current-files file://media/"backup digitaal archief"
Local and Remote metadata are synchronized, no sync needed.
Last full backup date: none
Traceback (most recent call last):
  File "/usr/bin/duplicity", line 1262, in <module>
    with_tempdir(main)
  File "/usr/bin/duplicity", line 1255, in with_tempdir
    fn()
  File "/usr/bin/duplicity", line 1213, in main
    list_current(col_stats)
  File "/usr/bin/duplicity", line 514, in list_current
    sig_chain = col_stats.get_signature_chain_at_time(time)
  File "/usr/lib/python2.7/dist-packages/duplicity/collections.py", line 959, in get_signature_chain_at_time
    raise CollectionsError("No signature chains found")
CollectionsError: No signature chains found

Thanks for your help