problems with calibre database

Hi,
last week my pc shut down. when i reopened it, The calibre database was damaged.
I tried to make calibre rapair it, but to no avail.
Then i tried adding all my library to calibre from the beginning (add every book in the cartel as the sam book)
but calibre only added some of them .. other calibre added but withoutfiles inside, other calibre didn't add at all.
How can i recreate the library???