Disable GUI initial setup

Hi all, Using python SDK i am trying to disable the GUI initial setup. But it does not work for me :( Can anyone help? BR Chanan

   method will disable GUI setup
def _init_gui_setup(self):
    try:
        print("=======> disabling F5 bip ip GUI initial setup")
        logger.info("disabling F5 bip ip GUI initial setup")
        bigip = bigip_ManagementRoot(
            self.public_ip,
            'admin',
            self.password)

        t_end = time.time() + 60 * 2
        while time.time() < t_end:
            logger.info("disabled GUI initial setup")
            settings = bigip.tm.sys.global_settings.load()
            from pprint import pprint
            pprint(settings.raw)
            if settings.guiSetup == 'disabled':
                break
            settings.guiSetup = 'disabled'
            settings.update()
        print("=======> init gui setup successful")
        logger.info("init gui setup successful")
        return
    except iControlUnexpectedHTTPError:
        logger.warning("failed to init GUI initial setup on {}".format(
            self.public_ip
        ))
        raise