How to wake up using RTC interrupt from sleep mode?

Hi!

I am try to wake up after 1 minute using RTC(Real Time Clock) on XC164CS(.
I checked sleep mode is working well, but I think some settings are missed.
When I read the user manunal especillay RTC part, I found a clue when user enter the sleep mode the system clock stop completely and the RTC would stop counting. In this case RTC can be switched to Asynchrous mode.
Firt time I set synchrous mode(defualt setting) which is setted by DAVE. and it does not wake up.
And then I try to change Asynchronous mode, It also did not working. I think it may be missing.
Please let me know what is the problem?

E-mail : hssong@katech.re.kr

Below is my test program.

// RTC function
// 1 min RTC interrupt setting
void RTC_vInit(void)
{
  MAIN_vUnlockProtecReg();       //unlock SYSCON0
  SYSCON0_RTCCM  =  1;           // disable access to control bits
  while((RTC_CON & 0x8000) == 0x8000);
  RTC_CON        =  0x0002;      // load RTC control register

  ///  - overflow period on T14:  1.0000 [s]
  ///  - overflow period on CNT0: 1.0000 [min]
  ///  - overflow period on CNT1: 1.0000 [h]
  ///  - overflow period on CNT2: 1.0000 [days]
  ///  - overflow period on CNT3: 1.0139 [years]

  RTC_T14REL     =  0x85EE;      // load T14 count/reload register
  RTC_RTCL       =  0x13C4;      // load RTC low register
  RTC_RELL       =  0x13C4;      // load RTC reload low register
  RTC_RTCH       =  0xA4E8;      // load RTC high register
  RTC_RELH       =  0xA4E8;      // load RTC reload high register

  //  -----------------------------------------------------------------------
  ///  Configuration of the used RTC Interrupts:
  ///  -----------------------------------------------------------------------
  ///  RTC service request node configuration:
  ///  - RTC interrupt priority level (ILVL) = 7
  ///  - RTC interrupt group level (GLVL) = 0
  ///  - RTC group priority extension (GPX) = 0

  RTC_IC         =  0x005C;

  RTC_ISNC       =  0x0004;      // load RTC interrupt sub node register
}

// RTC Interrupt routine
void RTC_viRTC(void) interrupt RTCINT
{
  if(RTC_ISNC_0IR)            // if counter CNT0 overflow
  {
    RTC_flag = 1;
    RTC_ISNC_0IR = 0;
  }
} //  End of function RTC_viRTC

// main() function

void main()
{
  // 1 min RTC Interrupt setting
  RTC_vInit();

  // RTC RUN
  RTC_CON_RUN = 1;

  // Enter sleep mode
  Enter_Sleep_mode(); // it is user coding , its ok

  // After 1 min. RTC wake up
  if(RTC_flag == 1){
     printf("RTC wake up OK \n");
  }
}