Why doesn't it work ??

I am vary new to gtk, but like what I have seen,.

I have a question with source code.  As far as I can tell it should
work, but it dose not (for me).  If someone could have a look at the
code and try it would be great.  I wrote this simple code fragment that
contains the problem.  I want the 'label' of a 'toggle' button to change
as the button is toggled form one state to the next.  The program tries
to just change it once from "UP" to "DOWN".  If this works, I can add
the code to have the right label for the right state of the button.
If I am doing this all wrong, or am just plan stupid, I would appreciate
your insight and hopefully your solution.

I compile the attached code with:
gcc -g toggle.c -o toggle `gtk-config --cflags --libs`

About my system:
RedHat 6.1
IBM ThinkPad 390X
gtk 1.2.5  (I get this from the line:
    g_print ("gtk %d.%d.%d\n",gtk_major_version, gtk_minor_version,

If you want any other information, please ask.

P.s. I seem to have a couple of issues with passing args to callbacks, I
am hopping to find the problem with this problem, there by fixing the
other problems.

I appreciate your help.
#include <gtk/gtk.h>

void cb_toggle (GtkWidget*, GdkEvent*, GtkWidget*);
void cb_exit (GtkWidget*, GdkEvent*, gpointer);
int main (int, char**);

void cb_toggle (widget, event, label)
GtkWidget *widget;
GdkEvent *event;
GtkWidget *label;
	gtk_label_set_text (GTK_LABEL (label), "DOWN");

void cb_exit (widget, event, data)
GtkWidget *widget;
GdkEvent *event;
gpointer data;
	gtk_main_quit ();

int main (num, str)
int num;
char **str;
	GtkWidget *window;
	GtkWidget *toggle;
	GtkWidget *label;

	gtk_init (&num, &str);

	window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
	gtk_signal_connect (GTK_OBJECT (window), "delete_event",
		GTK_SIGNAL_FUNC (cb_exit), NULL);

	toggle = gtk_toggle_button_new ();
	gtk_container_add (GTK_CONTAINER (window), toggle);
	gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
		GTK_SIGNAL_FUNC (cb_toggle), label);
	gtk_widget_show (toggle);

	label = gtk_label_new ("UP");
	gtk_container_add (GTK_CONTAINER (toggle), label);
	gtk_widget_show (label);

	gtk_widget_show (window);

	gtk_main ();

	return (0);


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