[Evolution] Error when restoring backup in Evolution

[NONAME noname <stelkork yahoo gr>]

Hello,

I've just downgraded from debian wheezy to squeeze and I have a problem restoring my evolution backup. I created the evolution-backup-date.tar.gz using the backup option in File menu and now that I try to restore it I get a message "Invalid backup file". I've tried moving the backup file in home directory and changed its name to evolution-backup.tar.gz as is suggested in many walkarounds, but with no luck. Also, I had plenty of free disk space when I created the backup file so I don't think it is corrupted somehow. I guess it is an issue of combatibility between different versions of evolution, but is there any way to manually move my accounts, mails and addresses into .evolution folder? I've made a try, but the structure of the backup file is a little different from .evolution folder so I didn't have any success in that either...

Thanks in advance