How can I use g_signal_connect() to pass a gponiter parameter

[learning_gtk <learning_symbian hotmail com>]

I hope to use  g_signal_connect() to pass a gchar* parameter like this:

gchar* radio1= "Radio1"; //it is global variable
gchar* radio2= "Radio2";
gchar* radio3= "Radio3";

void item_radio_print1(gpointer* data)
{
        g_print("This is the radio %s\n", (gchar *)data);
}

g_signal_connect(G_OBJECT(item_radio1), "activate",
                     GTK_SIGNAL_FUNC(item_radio_print1), (gpointer*)radio1);
g_signal_connect(G_OBJECT(item_radio2), "activate",
                     GTK_SIGNAL_FUNC(item_radio_print1), (gpointer*)radio2);
g_signal_connect(G_OBJECT(item_radio3), "activate",
                     GTK_SIGNAL_FUNC(item_radio_print1), (gpointer*)radio3);

But, those strings can not be printed.

Please help me. Thanks!
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