Standby mode for S128

Hi,

I need some advice to set the S128 into sleep or standby mode. I follow the example and some of the post on the forum but don't see any change on the power consumption on the S128-DK

if (MODE == LPMV2_LOW_POWER_MODE_SLEEP)
{
   g_lpmv2_sleep_mode.p_api->init (); 
   g_lpmv2_sleep_mode.p_api->lowPowerCfg (g_lpmv2_sleep_mode.p_cfg); 
   g_lpmv2_sleep_mode.p_api->lowPowerModeEnter (); 
}

if (MODE == LPMV2_LOW_POWER_MODE_STANDBY)
{
   g_lpmv2_standby_mode.p_api->init (); 
   g_lpmv2_standby_mode.p_api->lowPowerCfg (g_lpmv2_standby_mode.p_cfg); 
   g_lpmv2_standby_mode.p_api->lowPowerModeEnter (); 
}

Thanks.