Cyrus mailbox restore

Hi all, I had to reload my notebook, and now I'm trying to restore my mail. I had cyrus-imap running before. I made a tarball of the whole /var/spool/imap directory, and restored that after reloading. Then I logged into cyradm as user cyrus and ran: reconstruct user.hansdp It didn't change much, cyrus would still only see my inbox, none of the subfolders. I'm obviously doing this wrongly. What is the correct way to restore a cyrus mailbox? Thanks Hans