dovecot - Sep 2011 - Help restoring imap mail

My mailserver blew up today with a power hit.  I've created a new server 
and have dovecot running and I want to restore my mail.  I have a copy 
of the file that was in /var/mail.  I set the new dovecot config up the 
same as the old one and copied the mail file over.  I can see the INBOX 
mail but none of the rest of it.  I'm running 1.2.15 under Ubuntu server 
11.04.  I'm using Thunderbird as my client running on XP.  Any help 
would be greatly appreciated.

Thanks,

-- 


Knute Johnson