CCS/MSP430FR5857: ADC sampling by timer triggered for sequence of channels are not working properly

Tool/software: Code Composer Studio

Dear Sir / Madam ,

I am using MSP430FR5857 MICRO CONTROLLER for my application. I am sensing AC voltage sensing, AC current sensing and   PWM signal which is generated by microcontroller itself  on channel A1, A2,A3 respectively . I have used same PWM signal timer triggered for ADC sampling for all the three channel in sequence of channel mode and even tried in repeat sequence of channel mode but not getting all the three channels ADC value properly .Even example code i have seen for single repeat  sequence of channel mode but nothing much helpful .

i have given below my ADC configuration and timer configuration also same timer is used for generating interrupt for reading all these values .

    ADC12CTL0=ADC12SHT0_0 | ADC12ON | ADC12MSC    ;
    ADC12CTL1=ADC12SHS_1 | ADC12SHP | ADC12CONSEQ_1 |ADC12SSEL_3  ;
    ADC12MCTL0 |= ADC12INCH_3;
    ADC12MCTL1 |= ADC12INCH_2;
    ADC12MCTL2 |= ADC12INCH_1 | ADC12EOS;
    ADC12CTL0 |=  ADC12SC | ADC12ENC ;

timer configuration

      TA0CCR0 = 16000;  // SET TIMER PERIOD
     TA0CCTL1 = OUTMOD_3;  // SET OUTPUT MODE RESET/SET
     TA0CCR1 = 11734;

    TA0CCTL0 =CCIE;

    TA0CTL = TASSEL__SMCLK | MC__UP

Please reply as soon as possible . I will be awaiting for your kind response.