@Fee McQ - you don't want to overwrite the wp-config.php file on the server as that's essential to making WordPress run and if your "local" wp-config file is different then the one on the server, you can easily take down your site!
If you do need to edit the wp-config file, download the one from the server first then make your changes and upload it back to the server, overwriting the old one. Basically don't overwrite wp-config unless you really mean it!
@1stAngel: as I noted the first time, something on your server is preventing the Automatic Update from working correctly. Contact your host and let them know that WordPress' automatic updates are not working where they had been working previously. Ask them to look at the server logs as this may provide helpful information to determine what's going wrong.