problem reinstalling WP

I had already installed WP and was working on the blog. I don’t know what I did that now I can’t access it. I get the following message:

// Let’s check to make sure WP isn’t already installed.
if ( is_blog_installed() ) die(‘<h1>’.__(‘Already Installed’).'</h1><p>’.__(‘You appear to have already installed WordPress. To reinstall please clear your old database tables first.’).'</p></body></html>’);

I went ahead anc cleared my database and reinstalled WP. Now, I keep getting the same message as above. I have no idea what else to do. Thanks.