DB_HOST of net4india server

I am trying to install through wp-admin/install.php and I am getting this error.

Error establishing a database connection

The mysqladmin page given by my Hosting Provider is https://mysqlwin1.net4india.com through which I am able to login with my DBUsername and DBPassword. But the same is not working through PHP. My WP-Config.php details are as follows :

define(‘DB_NAME’, ‘TestDB’); // The name of the database
define(‘DB_USER’, ‘DBUsername’); // Your MySQL username
define(‘DB_PASSWORD’, ‘password’); // …and password
define(‘DB_HOST’, ‘https://mysqlwin1.net4india.com’);

I tried changing the Host to localhost and ip address but no luck. But I am able to login to Mysqladmin with the same details.