HELP ON CHATZONE.MOBI SCRIPT

I downloaded chatzone.mobi script and i uploaded it on my site, i changed the settings from config.php to my database name, user and password, but its all mombo jombo. Why i said so is because when i entered my url to my site like this e.g mysitesiteurl.nazuka.net it open a page showing on the header that INDEX and in the page INDEX OF/ then below it i saw all the files in the script instead of it to load my site as usual. Please guys if you have any idea on how to set up a chat like CHATZONE.MOBI please help me. Thanks to any help i'll get from you all.