Message not found

hi everybody,
I have an embarrassing problem with windows mail: carrying out one change
of the predefined folder for archive of windows mail some days ago (moving
it to another hard disk in order to save as much as possible in case of
crash;

-)),
the PC has shut down unexpectedly, therefore I found that windows mail
correctly showed index of the emails in all the folders, but in truth it
did not show approximately 50 % of the messages content, with the following
visualization message: "Message cannot be found The contents of this message
cannot be found. Windows Mail "

In truth opening the messages in format .eml in the backup folder I
succeeded to visualize the content, so the message is still there.....
therefore I have thought there could be a indexing problem..... what I can
make in order to re-match all this messages?

thanks a lot
cesare