php-gtk win crashes

Hi All,

From various code snippets posted to this group and the example files, I'm
trying to run the program below, but keep getting a Dr. Watson php.exe crash
dump on WinNT.
The window opens up OK with the default NULL value in the entry box. However
php crashes when the timeout_add(...) routine is called for the second time.
Any thoughts?

Thanks,
Hien

----code snippet----
<?
if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN')
        dl('php_gtk.dll');
else
        dl('php_gtk.so');

function delete_event() {
        return false;
}

/*
 * Called when the window is being destroyed. Simply quit the main loop.
 */
function destroy() {
        Gtk::main_quit();
}

// general close window function all widgets
function close_window($widget,$text_entry)
{
	$value = $text_entry->get_text();
	print $value;
	$window = $widget->get_toplevel();
	$window->hide();
	return true;
}

function create_entry()
{
		$window = &new GtkWindow;
		$windows['entry'] = $window;
		$window->connect('delete-event', 'delete_event');
		$window->set_title('Configuration');
		$window->set_border_width(0);

		$box1 = &new GtkVBox();
		$window->add($box1);
		$box1->show();

		$box2 = &new GtkVBox(false, 10);
		$box2->set_border_width(10);
		$box1->pack_start($box2);
		$box2->show();

		$entry = &new GtkEntry();
		$entry->set_text('Hello World');
		$entry->select_region(0, 5);
		$box2->pack_start($entry);
		$entry->show();
                $entry->set_visibility(false);

		$separator = &new GtkHSeparator();
		$box1->pack_start($separator, false);
		$separator->show();

		$box2 = &new GtkVBox(false, 10);
		$box2->set_border_width(10);
		$box1->pack_start($box2, false);
		$box2->show();

		$button = &new GtkButton(' Save and Close');
		$button->connect('clicked', 'close_window',$entry);
		$button->set_flags(GTK_CAN_DEFAULT);
		$button->grab_default();
		$button->show();
}


function draw_screen(){
global $entry1,$timer;
   $entry1->set_text("".$timer++);
return true;
}


// create_main_window()
	$window = &new GtkWindow();
	$window->set_policy(false, false, false);
	$window->set_name('main window');
	$window->set_usize(200, 400);
	$window->set_uposition(20, 20);

	$window->connect_object('destroy', array('gtk', 'main_quit'));
	$window->connect_object('delete-event', array('gtk', 'false'));

	$box1 = &new GtkVBox();
	$window->add($box1);

	$label = &new GtkLabel('Timer');
	$box1->pack_start($label,false);
	$label->show();

	$entry1 = &new GtkEntry();
	$entry1->set_text('NULL');
	$box1->pack_start($entry1,false);
	$entry1->show();
	$entry1->set_editable(false);
	$entry1->set_sensitive(true);

	$separator = &new GtkHSeparator();
	$box1->pack_start($separator, false);

	$box2 = &new GtkVBox(false, 10);
	$box2->set_border_width(10);
	$box1->pack_start($box2, false);

	$button = &new GtkButton('close');
	$button->connect_object('clicked', array('gtk', 'main_quit'));
	$box2->pack_start($button);
	$button->set_flags(GTK_CAN_DEFAULT);
	$button->grab_default();

	$window->show_all();


//******* Global variables
$timer = 0;

//create_main_window();
gtk::timeout_add(1500, 'draw_screen');

Gtk::main();
?>