gtk_dialog dead-lock problem

[Arkadiusz Krysiak <arkadiusz krysiak wroclaw gmail com>]

i'm beginner and i have problem with gtk_dialog.

it's my source code:
{
    datastruct->flags=GTK_DIALOG_DESTROY_WITH_PARENT;
    datastruct->dialog=gtk_dialog_new_with_buttons
                            (
                            "Komunikat",
                            GTK_WINDOW(parent),
                            datastruct->flags,
                            message1,GTK_RESPONSE_OK,
                            message0,GTK_RESPONSE_REJECT,
                            NULL
                        );
    datastruct->content_area=gtk_dialog_get_content_area
(GTK_DIALOG(datastruct->dialog));
    datastruct->label=gtk_label_new(opis);
    gtk_container_add (GTK_CONTAINER (datastruct->content_area),
datastruct->label);
    gtk_widget_show_all (datastruct->dialog);
    datastruct->data=gtk_dialog_run(GTK_DIALOG(datastruct->dialog));
    gtk_widget_destroy(datastruct->dialog);
    return(datastruct->data);
}

for main window it's ok but for next level windows line:
datastruct->data=gtk_dialog_run(GTK_DIALOG(datastruct->dialog)); cause
dead-lock.
have any idea for reason.