diff --git a/hot.c b/hot.c
index bdac0bf..d2926bb 100644
--- a/hot.c
+++ b/hot.c
@@ -15,6 +15,7 @@
 
 static void on_experimental_expander_toggled(GtkExpander *expander, gpointer user_data){
   gtk_expander_set_expanded (expander, gtk_expander_get_expanded (expander));
+  printf(">>>>>>>  %s  <<<<<<<\n", gtk_expander_get_label (user_data));
 }
 
 GtkBox *get_experimental_box_new(){
@@ -25,12 +26,13 @@ GtkBox *get_experimental_box_new(){
   GtkExpander *hello = GTK_EXPANDER (gtk_expander_new ("hello !"));
   gtk_expander_set_expanded (GTK_EXPANDER (hello), TRUE);
   gtk_widget_set_margin_start (GTK_WIDGET (hello), 0);
-  g_signal_connect (hello, "bidule", G_CALLBACK (on_experimental_expander_toggled), hello);
+  g_signal_connect (hello, "activate", G_CALLBACK (on_experimental_expander_toggled), hello);
   gtk_box_append (experimental_box, GTK_WIDGET (hello));
 
   GtkExpander *it_s_me = GTK_EXPANDER (gtk_expander_new ("it's me !"));
   gtk_expander_set_expanded (GTK_EXPANDER (it_s_me), FALSE);
   gtk_widget_set_margin_start(GTK_WIDGET (it_s_me), 20);
+  g_signal_connect (hello, "activate", G_CALLBACK (on_experimental_expander_toggled), it_s_me);
   gtk_box_append (experimental_box, GTK_WIDGET (it_s_me));
 
   gtk_box_append (experimental_box, GTK_WIDGET(gtk_label_new ("\n\n")));
diff --git a/hot.o b/hot.o
index 05ce873..8029d19 100644
Binary files a/hot.o and b/hot.o differ
diff --git a/myprogram b/myprogram
index 1f9ea01..8b49fbb 100755
Binary files a/myprogram and b/myprogram differ