Well, you may try to repair your DB with velocis db tools, but I bet they won't repair anything an will last for ages.
You can try :
net stop casdbengine
del database\r*.*
net start casdbengine
Then run dbfix, dbdefrag, keybuild.
Or you can use an empty DB, recreate your pools if any and recreate FSD, to restart on a clean basis.
Regards.