Mysql problem igennem php-gtk

Heysa!

Jeg har lavet denne lille ting, hvor den skal trække nogle rækker du af min tabel. Men jeg får fejlen:
Fatal error: Call to a member function on a non-object line 20.

$extension = "php_gtk" . (strpos(PHP_OS, "WIN") >= 0 ? ".dll" : ".so");
dl($extension);

$window = &new GtkWindow();
$window->set_title("Test App");
$window->set_usize(300, 100);
$window->set_position(GTK_WIN_POS_CENTER);
$window->set_policy(false, false, false);

$window->connect("destroy", "killwin");

function killwin()
{
gtk::main_quit();
}

$button = &new GtkButton('Forbind og hent');
$button->connect('clicked', 'getdata');
//line 20
$box->pack_start($button);

function getdata($theButton)
{

global $server;
global $user;
global $pass;

}

$dServer = $server->get_text();
$dUser = $user->get_text();
$dPass = $pass->get_text();

$s = mysql_connect($dServer, $dUser, $dPass) or die("Couldn't 
connect to database server");

$d = mysql_select_db("doodoo_dk_db2", $s);


$label1->hide();
$label2->hide();
$label3->hide();
$server->hide();
$user->hide();
$pass->hide();
$button->hide();

$result = mysql_query("SELECT * FROM du_users ORDER BY tid DESC");
$pList = "";

while($row = mysql_fetch_array($result))
{

$pList .= $row["username"] . " is " . $row["sex"] . "\n";
}

$p = &new GtkLabel("$pList");
$box->add($p);
$p->show();

$window->show_all();

gtk::main()

Hvad er der ivejen?