Database Connection Problem

Hello I am looking for a bit a help, I keep receiving this error. Any help would be really great this is my first time setting this up. 

Unable to connect to your database server using the provided settings.
Filename: /home/o2pibjtsjvfp/public_html/third_party/MX/Loader.php
Line Number: 102

Unable to connect to your database server using the provided settings.

Not familiar with MX library, but looks like issue is in configuration, it says so in error message.

From here you have few potential next steps.
- check that MX library been set up based on their instructions
- if correct, check the details you are using for DB are correct, there are no spaces in the beginning or end of the settings, etc
- if correct, check that config file actually loads, in PHP you can just whack quick die('this file loads'); in the config file

@ Pertti, MX Library is the Wiredesigz HMVC

The error is letting you know that your database settings are wrong.

Check your database settings.

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )

The problem is in username, i realize there's additional suffix. such as suffix_user I think the same errors in Core/Loader.php make sure the username, password and host are right.