How to wake up from SHUTDOWN MODE?

[march]

EVM : NUCLEO-WB09KE

PRJECT: BLE_p2pServer_ota

I tried to enter Shutdown Mode via "sw3"。The code is as follows:

void APPE_Button3Action(void)
{
  PWR_SHUTDOWNTypeDef  sConfigSHUTDOWNT;
  if (bleAppContext.Device_Connection_Status != APP_BLE_CONNECTED_SERVER)
  {
	APP_DBG_MSG("Shutdown\n");
	HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PB0,PWR_WUP_FALLEDG);
	/* Clear all related wakeup flags*/
	__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF0);
	sConfigSHUTDOWNT.BORStatus = ENABLE;
	sConfigSHUTDOWNT.WakeUpPinStatus = ENABLE;
	sConfigSHUTDOWNT.WakeUpPol = PWR_WUP_FALLEDG;
	/* Enter the Standby mode */
	HAL_PWR_ConfigSHUTDOWN(&sConfigSHUTDOWNT);

	HAL_PWREx_EnterSHUTDOWNMode();
  }
  else
  {
    APP_BLE_Procedure_Gap_Peripheral(PROC_GAP_PERIPH_CONN_PARAM_UPDATE);
  }

  return;
}
#endif /* (CFG_BUTTON_SUPPORTED == 1) */

However, when I lowered PB0 from 3V to 0V, there was no wake-up behavior. And UART TX does not output any message.

Please tell me, how to solve this problem! 

Thanks~