MSP430FR6922: Code is stuck in oscillator fault flag

Hello,

I use a MSP430FR6922 controller on  my board. I want to set ACLK as LFXTCLK=32.768kHz, MCLK=DCOCLK=16MHz,SMCLK=DCOCLK in my code. then SMCLK/4=4MHz...

My code is:-

#include "common.h"

/* Function to initialize device at internal crystal 16MHz and external 32.768khz*/
void dev_init_16M(void)
{
    PJSEL0 |= BIT4 | BIT5;                    // For XT1

    // Disable the GPIO power-on default high-impedance mode to activate
    // previously configured port settings
    PM5CTL0 &= ~LOCKLPM5;

    // Configure one FRAM wait state as required by the device data sheet for MCLK
    // operation beyond 8MHz _before_ configuring the clock system.
    FRCTL0 = FRCTLPW | NWAITS_1;

    // Clock System Setup
    CSCTL0_H = CSKEY >> 8;                    // Unlock CS registers
    CSCTL1 = DCOFSEL_4 | DCORSEL;            // Set DCO to 16MHz
    CSCTL2 = SELA__LFXTCLK | SELS__DCOCLK | SELM__DCOCLK; // Set SMCLK = MCLK = DCO=16Mhz,ACLK=LFXT=32.768kHZ
    CSCTL3 = DIVA__1 | DIVS__4 | DIVM__1;     // Set all dividers SMCLK/4=4MHz
    CSCTL4 &= ~LFXTOFF;
      do
      {
        CSCTL5 &= ~LFXTOFFG;                    // Clear XT1 fault flag
        SFRIFG1 &= ~OFIFG;
      }while (SFRIFG1&OFIFG);                   // Test oscillator fault flag

    // Now that osc is running enable fault interrupt
//    SFRIE1 |= OFIE;
//    __bis_SR_register(LPM0_bits);             // Wait in LPM0 for fault flag
    CSCTL0_H = 0;                             // Lock CS registers}
}

//
//#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
//#pragma vector=UNMI_VECTOR
//__interrupt void UNMI_ISR(void)
//#elif defined(__GNUC__)
//void __attribute__ ((interrupt(UNMI_VECTOR))) UNMI_ISR (void)
//#else
//#error Compiler not supported!
//#endif
//{
//  do
//  {
//    // set a breakpoint on the line below to observe XT1 operating from VLO
//    // when the breakpoint is hit during a crystal fault
//    CSCTL5 &= ~LFXTOFFG;                    // Clear XT1 fault flag
//    SFRIFG1 &= ~OFIFG;
//    P1OUT |= BIT0;
//    __delay_cycles(25000);                  // time for flag to get set again
//  }while (SFRIFG1&OFIFG);                   // Test oscillator fault flag
//}

When I ran the code, I noticed that it was stuck at the last do-while loop, that checks for the oscillator fault flag.

What is the reason?? My code is wrong?? or it is because of hardware issue??

please help..its urgent