MSP430F149: Bluetooth upgrade issue

#include "io430.h"
#include "flash.h"
void USART_Init(void);

void main( void )
{
  char i=0;
  WDTCTL = WDTPW + WDTHOLD;
  flash_init();
  USART_Init();
  while(1)
  {
    while (IFG1 & URXIFG0)
    {
     rec[i]=RXBUF0;
     i++;
     if(i==count)
     {
       i=0;
       flash_write(rec);
       asm(" br &0x8100;");//Jump after receiving the upgrade 

     }
     
    }
  }
}
void USART_Init(void)
{
    P3SEL |= BIT4+BIT5;                            // P3.4,5 is selected as the UART transceiver port 
    ME1 |= UTXE0 + URXE0;                     // Enable USART0 transmit and receive 
    UCTL0 |= CHAR;                            // 8-bit character
    UTCTL0 |= SSEL0;                          // UCLK = ACLK
    UBR00 = 0x03;                             // 32k/9600 - 3.41
    UBR10 = 0x00;                             //
    UMCTL0 = 0x4A;                            // Modulation
    UCTL0 &= ~SWRST;                          // Initialize the UART0 state machine 
    IE1 |= URXIE0;                            // Enable to receive interrupts 
   // _EINT();
}
#pragma vector=USART0RX_VECTOR 
__interrupt void USART0RX_ISR(void)
{
  asm(" br &0x81A2;");//Serial interrupt redefined 

  
}

#include "msp430x14x.h"  
#define CPU_F ((double)8000000)   //Accurate time delay 
#define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0))  
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))
void USART_Init(void);

void main( void )
{
  WDTCTL = WDTPW + WDTHOLD;
  
  
   BCSCTL1 &= ~XT2OFF;                 //Turn on the XT2 high-frequency crystal oscillator 
  do
  {
    IFG1 &= ~OFIFG;                 //Clear the crystal fail flag 
    for (char z = 0xFF; z > 0; z--);     //Wait for the 8-MHz crystal to oscillation 
  }
  while ((IFG1 & OFIFG));             //Crystal failure flag still present? 
  BCSCTL2 |= SELM_2 + SELS;           //MCLK and SMCLK select high frequency crystal 
  USART_Init();
  P2DIR|=0XFF;
  P2OUT=0X00;
  delay_ms(2000);
  P2OUT=0Xff;
  delay_ms(2000);
  P2OUT=0X00;
  while(1)
  {
    LPM0;
  }

}
#pragma vector=USART0RX_VECTOR 
__interrupt void USART0RX_ISR(void)
{
  char r;
  r=RXBUF0;
  P2OUT^=0xFF;
 
}
void USART_Init(void)
{
    P3SEL |= 0x30;                            // P3.4,5 is selected as the UART transceiver port 
    ME1 |= UTXE0 + URXE0;                     // Enable USART0 transmit and receive 
    UCTL0 |= CHAR;                            // 8-bit character
    UTCTL0 |= SSEL0;                          // UCLK = ACLK
    UBR00 = 0x03;                             // 32k/9600 - 3.41
    UBR10 = 0x00;                             //
    UMCTL0 = 0x4A;                            // Modulation
    UCTL0 &= ~SWRST;                          // Initialize the UART0 state machine 
    IE1 |= URXIE0;                            // Enable to receive interrupts 
    _EINT();
}