Problems when importing a DB

Hi there.
I have a blog running. I exported the database of it via MySQL and want to import it in the new location. This process is OK, but WP has conflicts with it. Take a look: https://blogopolis-cl.iatrogenia.com
The original blog is running. I’ve installed and reinstalled WP a thousand times, even deleted the last blank line on widgets.php and plugable.php and it still doesn’t work.
Any help will be greatly appreciated.
Thanks in advance.