I'm getting Error establishing a database connection.

Hi Friends,

Please help I’m getting the below error

Error establishing a database connection

when I’m trying to access my site as https://www.mysite.com and it is running fine as https://www.mysite.com/wordpress.

I’ve used freehostia’s automatic installation for wp.

It’s frustating…I’ve tried a a a lot and still looking for sum1 to fix this.