MySQLi cannot connect to server

Using PHP installed on Windows Server 2008 I attempt to connect to an external MySQL DB, but get the following error:

On lines 172-181 in class_DbConnect.php I have the following code:

function connect()
	{
		self::$instance = new mysqli($this->DB_HOST, $this->DB_USERNAME, $this->DB_PASSWORD, $this->DB_DATABASE);
		
		if (mysqli_connect_errno()) {
			$this->raise_error(printf("Connect failed: %s\n", mysqli_connect_error()));
		}
		
		return self::$instance;
	}

PHP:

Any ideas on what is going on? In my php.ini I have enabled the php_mysqli.dll extension. Please let me know if any more information is needed, and thanks in advance for any help.

 

B u m p

 

hi..
are the username and the password are correct ?
are the mysql server is running ?