CCS/MSP430F5528: Low-power modes not working?

Part Number:MSP430F5528

Tool/software: Code Composer Studio

Hi,

I want to set my MSP430F5528 into LPM3, however using energyTrace (using MSP-FET) I can't see any difference at all in energy consumption between active mode and LPM3. When debugging, I can see that the debugger in CCS v7 says "MSP430: Warning: CPU is currently OFF and debugging capabilities will be limited." when putting a breakpoint by the LPM3 code. 

I also tried to set it to LPM4 to see if I would not get any respons from it anymore, but it behaves as normal and "wakes up" with the internal VLO interrupt. So I'm not sure low-power mode is working here but what could be wrong?

(Note that I am using the MSP430 that is on the TDC1000-TDC7200EVM board, if that would make any difference?)

Here is the code: 

main.c

void main(void)
{
  
  WDTCTL = WDTPW+WDTHOLD;                                                      // Stop WDT 

  // oscillator fail if LED keeps flashing after InitMCU     
  InitMCU();

  next_trigger_time = 0;


  // init 100ms interval timer (timer1)
  timer1_A0_init();

  // init timer0 A0 for programmable external osc wake up time
  // or when MSP430TIMER_TDC is true, init as capture timer to continuously run
  timer0_A0_init();


  USBPWRCTL &= ~(SLDOEN+VUSBEN); // disbale internal 3.3v and 1.8v LDOs


  while (1) // Main loop
  {

    if (next_trigger_time)
    {

      next_trigger_time = 0;

      __no_operation();
      LPM3;
      __no_operation();

    }

  }
}

interrupt service routine:

//******************************************************************************
// Timer1 A0 interrupt service routine
//------------------------------------------------------------------------------
#pragma vector=TIMER1_A0_VECTOR
__interrupt void TIMER1_A0_ISR (void)
{

    _low_power_mode_off_on_exit();

    __delay_cycles(800); // wake up time is 3.5us from LPM3
     next_trigger_time = 1;

     __no_operation();
  
}

I can't figure out what is going on here...

Kind regards,
Thibault