Backup the files in your blog!
Clear out the files (not the folders) in your blog’s base directory. Don’t delete wp-config.php or you will have to re-enter all of your database information. Be careful not to delete other files you have placed in there as well, such as a favicon.ico or google hosted service pages, etc.
Download WordPress 2.5 again (just to be sure it’s current) and upload all of the files (again, no folders) in the /wordpress directory.
Check out your /wp-admin folder and if it worked, you will see the newest version of the login screen
That’s how I got mine working. It was probably a problem due to FileZilla not overwriting all of the files for some reason.
Worked for me.
Thanks aka.calisto
