I am loosing my soul with freedb offline

Hi guys,
I have downloaded the whole freedb database, extracted it to a folder, and followed all the steps indicated by Nero to import a database. Nero starts creating the database, which take a very impressive long time, and each time at 95% more or less it stops for an error, and no cds are in the database! What’s the problem? I have nero…
Thanks for any help!