database connection

[eluser]Unknown[/eluser]
I am getting the error not able to select database : database_name. But the problem is that this error is coming at random times, sometimes it works and other times it throws this error.

[eluser]jairoh_[/eluser]
in your database.php set the following configurations:

Code:

$db['default']['hostname'] = "localhost";
$db['default']['username'] = "root";
$db['default']['password'] = "";
$db['default']['database'] = "database_name";
$db['default']['dbdriver'] = "mysql";

[eluser]Unknown[/eluser]
that I have done already, without it I cannot really connect to database .