CCS/MSP430F67791A: UART Interfacing is problem

#include <msp430.h>


void UART_init()
{
    // Setup P3.0 UCA0RXD, P3.1 UCA0TXD
       P3SEL0 |= BIT0 | BIT1;                   // Set P3.0, P3.1 to non-IO
       P3DIR |= BIT0 | BIT1;                   // Enable UCA0RXD, UCA0TXD

       // Setup LFXT1
       UCSCTL6 &= ~(XT1OFF);                   // XT1 On
       UCSCTL6 |= XCAP_3;                      // Internal load cap
       // Loop until XT1 fault flag is cleared
       do
       {
           UCSCTL7 &= ~(XT2OFFG | XT1LFOFFG | DCOFFG);
           // Clear XT2,XT1,DCO fault flags
           SFRIFG1 &= ~OFIFG;                  // Clear fault flags
       } while (SFRIFG1 & OFIFG);              // Test oscillator fault flag

       // Setup eUSCI_A0
       UCA0CTLW0 |= UCSWRST;                   // **Put state machine in reset**
       UCA0CTLW0 |= UCSSEL_1;                  // CLK = ACLK
       UCA0BRW_L = 0x03;                       // 32kHz/9600=3.41 (see User's Guide)
       UCA0BRW_H = 0x00;                       //
       UCA0MCTLW = 0x5300;                     // Modulation UCBRSx=0x53, UCBRFx=0
       UCA0CTLW0 &= ~UCSWRST;                  // **Initialize USCI state machine**
     //  UCA0IE |= UCRXIE;                       // Enable USCI_A0 RX interrupt

    //   __bis_SR_register(LPM3_bits | GIE);     // Enter LPM3, interrupts enabled
    //   __no_operation();
}

void UART_Tx(unsigned char a)
{
    while (!(UCA0IFG & UCTXIFG));             // USCI_A0 TX buffer ready?
        UCA0TXBUF = a;
}

void UART_Str(unsigned char *a)
{
    while(*a!='\0')
        {
        UART_Tx(*a); a++;
        }
}


void main(void)
{
    int i=0;
    WDTCTL = WDTPW | WDTHOLD;               // Stop WDT
   
    UART_init();   

    while(1)
        {
        UART_Str("ABCD");
		
        }
}