The “Wordpress Address URL” setting is the address you want people to type in their browser to reach your WordPress blog.
The “Site Address URL” setting is the address where your WordPress core files reside.
It is possible to set the site URL manually in the wp-config.php file. Add these two lines to your wp-config.php, where “example.com” is the correct location of your site. You won’t be able to edit them on the General settings page anymore when using this method.
FTP to the site, and get a copy of the active theme’s functions.php file. You’re going to edit it in a simple text editor (like notepad) and upload it back to the site.
Add these two lines to the file, immediately after the initial “<?php” line.
Feel free to write in if you are not still not able to get it working !