That condition seems unusual though if the database being referenced is a backup copy of your live site where you typically login...

That said, because the backup copy of the site used an admin/includes/local/configure.php file, it would seem that if the database backed up wasn't the one referenced in that file, then it would explain why the password attempted didn't work...

Ok, I know that's confusing. This point of having four or in your case 6 files can get crazy...

Basically, the database that should be your testing database, should have been a backup of the database used on your live site. Revisit the above instructions to consider using whatever database is referenced in admin/includes/local/configure.php from your live site.