Cannot import accounts from Mail 2.1.2 to Mail 3.1

Question

My goal is to get my email accounts including 'Sent' mail to show up in Mail 3.0.
I got a Macbook Pro (running Leopard) to replace my old Powerbook G4 (running 10.4.11). I am trying to import my accounts but am having no luck.
_Here's what I did:_
1. I imported the mailboxes from my old Mac. This worked fine.
2. I copied the accounts folders from ~Library/Mail on the old Mac to the same place on the new Mac
3. I copied com.apple.mail.plist file from Preferences on the old Mac to the same location on the new Mac.
The Result:
The imported email accounts do NOT show up when I open Mail.
Like many other people that post here, my archive of sent email is among the most valuable (to me) information on my machine.
Thanks for your help.

Answer 1

ok, when you open mail>preferencs>accounts, I assume your email accounts are showing up, with correct setting?
go to mail>file>import mailboxes, then choose the osx version, then point leopard mail to the path/location where you moved the mailboxes from your powerbook, i.e. homefolder/library/mail, in that mail folder, you will see folders for each of your email accounts, and in these folders you will see the mailboxes for each account, that is where you want to point to.
then import... leopard mail will create an import mailbox where the emails imported will show. once that is done, then you can create new mailboxes if you choose and move these emails there, thereby not needing the import mailbox anymore.
hope this helps