Problem connecting to sqlite database

[eluser]grumble[/eluser]
Hi good CI people,

I hate for my first post to be a cry for help, rather than something more positive, but needs must... I've just started using CI and am trying to connect to my SQLite database. Here is my setup.

database.php:

Code:

...
$db['default']['hostname'] = "localhost";
$db['default']['username'] = "";
$db['default']['password'] = "";
$db['default']['database'] = "<path to sqlite db>/test.db";
$db['default']['dbdriver'] = "sqlite";
...

(of course, replace "<path to sqlite db>" with my actual path)
../application/controllers/test_controller.php:

Code:

<?php
class Test_controller extends Controller {

    function index()
    {
        echo "test 1";
        $this->load->database();
        echo "test 2";
    }
}
?>

I can see "test 1" on my page, but not "test 2". I don't get any error messages or anything. "test.db" is readable by everybody. Any suggestions?