need help in hosting drupal in 3ix

I am getting trouble in installing drupal in 3ix

first, I export database
then create database and import sql file to 3ix,
and then upload file to public_html
but it didn't work

in setting.php
I have modified this line: $db_url = 'mysqli://root@localhost/rights_of';

and the drupal is work in my pc

it shows this message:
If you are the maintainer of this site, please check your database settings in the settings.php file and ensure that your hosting provider's database server is running. For more help, see the handbook, or contact your hosting provider.

can anyone help me ???