CCS/MSP-EXP430FR5969: MSP-EXP430FR5969 puls counter problem

#include "driverlib.h"


void initGPIO(void);
void initClocks(void);


#define NUMBER_TIMER_CAPTURES       20

volatile unsigned int StoredCount  = 0;


int main(void) {



    WDT_A_hold(WDT_A_BASE);

    initClocks();

    initGPIO();



   // TA0CCTL2, Capture/Compare Control Register 0  for TA0
    TA0CCTL2 |= CCIE;   //   interrupt enable
    TA0CCTL2 |= CCIS_0; //   capture off of CCI0A //The capture inputs CCIxA are connected to external pins  selected with the CCIS bits.
    TA0CCTL2 |= CM_2;   //   capture on falling edge
    TA0CCTL2 |= CAP;    //   capture mode

    //Timer_A0 Control Register
    TA0CTL |= TASSEL_2  ;   // source timer A1 from SMCLK
   // TA0CTL |= MC1;//// Start timer
    TA0CTL |=TACLR;
    //TA0CTL |=TAIE;




    _BIS_SR(GIE);
   __no_operation();
 //       while(1)
 //       {
 //       }

}


void initClocks(void)
{
    /* Clock System Setup, MCLK = SMCLK = DCO (1MHz), ACLK = VLOCLK */
    CSCTL0_H = CSKEY >> 8;
    CSCTL1 = DCOFSEL_0;
    CSCTL2 = SELA__VLOCLK | SELS__DCOCLK | SELM__DCOCLK;
    CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1;
    CSCTL0_H = 0;
}




void initGPIO(void)
{
    /* Configure GPIO to default state */
    P1OUT = 0; P1DIR = 0xFF;
    P2OUT = 0; P2DIR = 0xFF;
    P3OUT = 0; P3DIR = 0xFF;
    P4OUT = 0; P4DIR = 0xFF;
    PJOUT = 0; PJDIR = 0xFFFF;


    GPIO_setAsOutputPin(GPIO_PORT_P4, GPIO_PIN6);  // Set P4.6 to output direction
    GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);   // Set P1.0 to output direction



    GPIO_setAsInputPinWithPullUpResistor(GPIO_PORT_P1,GPIO_PIN1);//pull up P1.1    //P1DIR &= ~BIT4;    P1SEL1 &= ~BIT4;   P1SEL0 |= BIT4;
    GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P1, GPIO_PIN1,GPIO_SECONDARY_MODULE_FUNCTION);//P1.1 is used as input capture    setup pin 1.1/TA0.CCI2A


	    // setup pin 1.1/TA0.CCI2A
  //  P1DIR &= ~BIT1;
  //  P1SEL1 &= ~BIT1;
  //  P1SEL0 |= BIT1;
	
	
	
    /* Disable the GPIO power-on default high-impedance mode. */
   // PM5CTL0 &= ~LOCKLPM5;    Lock bit is cleared:
    PMM_unlockLPM5();

}

#pragma vector = TIMER0_A1_VECTOR
__interrupt void Timer0_A1_ISR (void)
{
    StoredCount ++;

}