MSP430G2553: Failing to setup timer interrupt with LPM3

Part Number: MSP430G2553

Hello,

I made a project that used the DCO and a timer interrupt with LPM3 that worked fine. Now I am trying to do the same just with the VLOCLK and I simply cannot get it to work. Reason why the VLOCLK is because I don't need a lot of calculating power when awake and the device is usually in LPM4 with button interrupts (not in the code) and it only runns on a CR2032 and should last as long as possible. The interrupt does not fire. I tested the clock and it had about 10 KHZ which seems correct for the VLOCLK (although the range that is specified from 4 to 20 KHz seems rediculous).

#include <msp430.h> 

void sleep_ms()
{
    TACTL = (TASSEL1 | TACLR | TAIE);
    CCTL0 = CCIE;
    CCR0 = 0;
    TACCR0 = 3;
    TACTL |= MC_1;
    __bis_SR_register(LPM3_bits | GIE);
}

int main(void)
{
    WDTCTL = WDTPW | WDTHOLD;

    P1OUT = 0x00;
    P1DIR = 0xFF;
    P2OUT = 0x00;
    P2DIR = 0xFF;
    P3OUT = 0x00;
    P3DIR = 0xFF;

//P1SEL = BIT0  // to test the frequency


    BCSCTL3 |= LFXT1S_2;
    //_bis_SR_register(SCG1 | SCG0);
    _NOP();
    _NOP();
    _NOP();
    BCSCTL2 |= SELM_3 + DIVM_3;

    IFG1 &= ~OFIFG;
    __enable_interrupt();

    while(1)
    {

        P1OUT |= 0x02;
        sleep_ms();
        P1OUT &= ~0x02;
        sleep_ms();
    }
}

#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
{
    LPM3_EXIT;
    TACTL = 0;
    CCTL0 = 0;
}

So what am I missing? I simply don't see anymore what is going on.

Thanks for any tip.