external quartz not working

Hi to everybody,

I'm new at this forum, but I need to ask a question because I repeatedly tried to use the external crystal (32 KHz)  for ACLK with no results. 

I have a MSP430  F2272.

The strange thing is that at the beginning the  OFIFG is set (and this is ok), than I unset it at the beginning, 

but when the program is in execution, there is no OFIFG and also LFXT1OF and XT2OF are both unset, but ACLK not work. 

I settled the clock system with this code:

        __bis_SR_register(OSCOFF);	 //turn off the LF oscillator so the OFIFG does not fault 
        do 
        {
          IFG1 &= ~OFIFG;                           // Clear OSCFault flag 
          __delay_cycles(1000);
        } 
        while ((IFG1 & OFIFG));                   // OSCFault flag still set? 
  
        if (CALBC1_1MHZ==0xFF)		// If calibration constant erased	
	{											
		while(1);                               // do not load, trap CPU!!	
	}
	// Setting MCLK = 1MHz
	DCOCTL = 0;                               // Select lowest DCOx and MODx settings
	BCSCTL1 = CALBC1_1MHZ|DIVA_3;      // Set DCO to 1MHz
	DCOCTL = CALDCO_1MHZ;
        BCSCTL1 &= ~XTS;

	// Setting SMCLK = 1MHz
	BCSCTL2 &= ~SELS;                         // SMCLK 1 Mhz
        
        //IFG1 &= ~OFIFG; //CLR OSCILLATOR FAULT

	// Setting ACLK with source of XTAL = 32kHz and divided by 8.
	// Setting ACLK at 4096 Hz
	BCSCTL3 &= ~LFXT1S0+XCAP0+XCAP1;