gtk_builder NOT Working

[cet cet <xnidos yahoo com>]

I trying a test application with gtk_builder the application compiles
without any error but i can't see any visual parts of the program.Glade
Version:3.6.x saves in GtkBuilder format.

compile command:
gcc -Wall -g -o builder_new builder_new.c -export-dynamic `pkg-config --cflags --libs gtk+-2.0`

I only get "i got mwindow" message from the program then program exits;

Below my code;

#include <gtk/gtk.h>

void
show_message(GtkWidget *widget,gpointer user_data)
{
GtkWidget *dialog,*mwindow=GTK_WIDGET(user_data);

dialog = gtk_message_dialog_new (GTK_WINDOW(mwindow),
                                  GTK_DIALOG_DESTROY_WITH_PARENT,
                                  GTK_MESSAGE_INFO,
                                  GTK_BUTTONS_CLOSE,
                                  "Hi From Main Window");

gtk_widget_show(dialog);
 
g_signal_connect_swapped (dialog, "response",
                           G_CALLBACK (gtk_widget_destroy),
                           dialog);


}

int
main (int argc, char *argv[])
{
GtkWidget *mwindow=NULL,*button2,*button1;
GtkBuilder *builder;
GError *error=NULL;

gtk_init (&argc, &argv);

builder=gtk_builder_new();
gtk_builder_add_from_file(builder,"builder_new.glade",&error);

if(error){
g_print("Interface Load Error:%s",error->message);
g_error_free(error);
error=NULL;
g_object_unref(builder);
gtk_main_quit();
}

gtk_builder_connect_signals(builder,NULL);

mwindow=GTK_WIDGET(gtk_builder_get_object(builder,"window1"));
button1=GTK_WIDGET(gtk_builder_get_object(builder,"button1"));
button2=GTK_WIDGET(gtk_builder_get_object(builder,"button2"));

if(mwindow)  g_print("i got mwindow\n");



/*g_object_unref(builder);*/

 g_signal_connect(G_OBJECT(button1),"clicked",
                 G_CALLBACK(show_message),mwindow);

 g_signal_connect_swapped(G_OBJECT(button2),"clicked",
                 G_CALLBACK(gtk_main_quit),mwindow);

 g_signal_connect(G_OBJECT(mwindow),"destroy",
                 G_CALLBACK(gtk_main_quit),NULL);

gtk_widget_show_all(mwindow);
return 0;
}