"Manlio" wrote in message
news
Due to a PC serious crash I was forced to reinstall Outlook 2007.
During the import of my old pst file (saved for emergency), the data
acquisition stopped and Outlook freezed (may be the pst was
corrupted).

If this were to happen to me, I'd run a repair install of Office, then start
with a new mail profile, add the PST as the delivery location (NOT import it)
to the new mail profile, and try again.
--
Brian Tillman [MVP-Outlook]