Timer B Capture Mode + Interrupt

Hi,

i tried to test the Timer B capture interrupt (@ msp430f5529) but no interrupt was released.

I wanted to relase an interrupt by a positve edge at P5.6/TB0.0 -> CCR0 capture: CCI0A input.

So i configured the Timer B as follows(my complete test-program):

#include <msp430x552x.h>



void main(void){
   
    WDTCTL = WDTPW + WDTHOLD;
   
    P5SEL |= BIT6;                            // Option select: P5.6 -> TB0 CCI0A

    TB0CCTL0 |= CM_1 + CCIS_0 + CAP + CCIE;    // pos. edge + CCIXA + capture mode + Interrupt enable

    TB0CTL = TBSSEL_1 + MC_2;        // Timer B: ACLK + continous up
       
    while(1){
        _NOP();
        _BIS_SR(LPM0_bits + GIE);
       
    }   
}

#pragma vector=TIMER0_B0_VECTOR
__interrupt void TIMER0_B0_VECTOR_ISR (void){

    TB0CCTL0 &= ~CCIFG;
    _NOP();                                      // Set breakpoint here
}

I have no idea why nothings happen if i do a positvie edge at P5.6...

Did i some mistakes or forgot something to configure?

Thanks for replies

Krapser