Problem of entry on gnome applet

[FireHeron]

Hi everybody!
Today, I try to write a gnome applet. My applet look like this:

http://ubuntuforums.org/attachment.php?attachmentid=181832&d=1295847788

My problem is I can not click to type text on entry.
Here is my code:


#include <string.h>

#include <gtk/gtk.h>
#include <panel-applet.h>

static gboolean
applet_factory (PanelApplet *applet, const gchar *iid, gpointer user_data)
{
//GtkWidget *label;
GtkWidget *toggle;
GtkWidget *entry;
GtkWidget *box;

if (strcmp (iid, "OAFIID:bdict-appletApplet") != 0)
return FALSE;
/*
label = gtk_label_new ("Hello World");
gtk_container_add (GTK_CONTAINER (applet), label);
*/
box = gtk_hbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (applet), box);

toggle = gtk_toggle_button_new_with_label("A");
gtk_box_pack_start (GTK_BOX (box), toggle, FALSE, FALSE, 0);

entry = gtk_entry_new ();
gtk_editable_set_editable (GTK_EDITABLE (entry), TRUE);
gtk_entry_set_width_chars (GTK_ENTRY (entry), 12);
gtk_box_pack_end (GTK_BOX (box), entry, FALSE, FALSE, 0);

gtk_widget_show_all (GTK_WIDGET (applet));

return TRUE;
}

PANEL_APPLET_BONOBO_FACTORY ("OAFIID:bdict-appletApplet_Factory",
PANEL_TYPE_APPLET,
"GNOME Applet",
"0",
applet_factory,
NULL);



Can you help me?
Sorry for my bad English :(.
http://www.flickr.com/photos/58705799@N03/5383736916/