unable to connect to database after i upload my site on one of my free hosting site

[eluser]KrizzAngel[/eluser]
any suggest on how to setup the site?? i manage to import my own DB in host phpmyadmin though.. heres the error:

A Database Error Occurred

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

kindly enlighten me on how to work on this.

my setting is correct isnt it?

$active_group = "default";
$active_record = TRUE;

$db['default']['hostname'] = "montessori.zxq.net";
$db['default']['username'] = "theUsername"; <-- not the real un
$db['default']['password'] = "thePassword"; <-- not the real pwd
$db['default']['database'] = "montessori_zxq_db";
$db['default']['dbdriver'] = "mysql";
$db['default']['dbprefix'] = "";
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = "";
$db['default']['char_set'] = "utf8";
$db['default']['dbcollat'] = "utf8_general_ci";