If this copied .PST file has the same name as an existing file in that
folder and you overwrote the existing file with the copied file, you now
have a corrupt Outlook profile. Create a new profile with 'Control
Panel|Mail'(which will create a new, empty .PST file), open Outlook, use
'File|Open|Outlook Data File' to open the copied .PST, then close (and
delete, if you care to) the empty .PST created with the new profile.

http://www.howto-outlook.com/faq/newprofile.htm
Adding/Recreating a Mail Profile
http://www.slipstick.com/config/movepst.htm
http://office.microsoft.com/en-us/as...771141033.aspx
Reconnect your old Outlook data file

Hal
--
Hal Hostetler, CPBE --
Senior Engineer/MIS -- MS MVP-Print/Imaging -- WA7BGX
http://www.kvoa.com -- "When News breaks, we fix it!"
KVOA Television, Tucson, AZ. NBC Channel 4
Still Cadillacin' - www.badnewsbluesband.com

"Outish" wrote in message
k...
I managed to copy the pst file onto the new directory where Outlook stores
its data. However, when I try to open certain folders that contain mail
within Outlook 2007, I get the follwoing message..
'The messaging Interface has returned an unknown error. If the problem
persists, restart outlook' I have restarted outlook and keep getting this
message. Anything i can do? These mail folders contain important messages
which I would like to keep.

Thanks


"Gordon" wrote in message
...
Outish wrote:

I am trying to import a pst file that I exported from Outlook 2003 on
my
Win XP hard drive into Outlook 2007 on my Vista Hard drive before I
format
the XP drive.

Don't ever export or import a native outlook file. If the pst file is on
a
CD, copy it to your HDD, (do NOT overwrite the existing file, ie put it
somewhere other than the default location), remove the Read-Only
attribute,
then in Outlook go to File-Open-Outlook data file and navigate to where
you
copied it to. You then have two choices: either drag the data from your
old
pst file to the new, or set the old file as the default delivery
location,
and just carry on using it as normal.