Where is your WordPress ?
http://korsanjack.com/wp-login.php
Its throwing 404 instead of redirecting or opening. Delete that index.html file by the way :
http://korsanjack.com/index.html
It will be on the FTP root of Public folder.
Modifying wp-config-sample.php is the classical method and works for all (thats why its said officially). “can not connect to server” means you have given wrong info (username/password/databasename/database username etc).
Actually just opening the domain in browser after uploading wordpress itself redirects to a page that says there is no wp-config.php file and asks whether to create it. Depending on server setup, wp-config.php can be created in this way. Next step throws a webform to fill up the database name, host name etc. then proceed and install.
If you are getting that error it means that you have at least one incorrect value in the wp-config.php file. Normally this is a password that’s been spelt incorrectly, or the host name is not the correct one. You will need to double-check this with your hosting company as they will know the correct values to enter.