Why doesn't my ADC work? (F2812)

I don't know why ADC doesn't work. The ADCRESULT0 - ADCRESULT15 doesn't change even though my input to the ADC is a sine wave...

Please see my code below to see whether there is anything wrong?

void vMeasInit(VMEAS *p)
{
    DELAY_US(ADC_usDELAY);

    AdcRegs.ADCTRL1.all = ADC_RESET_FLAG;         // Reset the ADC Module, 0x4000
    asm(" NOP ");
    asm(" NOP ");

    AdcRegs.ADCTRL3.bit.ADCBGRFDN = 0x3;        // Power up bandgap/reference circuitry
    DELAY_US(ADC_usDELAY);                        // Delay before powering up rest of ADC

    AdcRegs.ADCTRL3.bit.ADCPWDN = 1;               // Power up rest of ADC
    AdcRegs.ADCTRL3.bit.ADCCLKPS = 3;             // Set up ADCTRL3 register
    DELAY_US(ADC_usDELAY);

 
    AdcRegs.ADCTRL1.all = ADCTRL1_INIT_STATE_BIPOLAR;    // Set up ADCTRL1 register
    AdcRegs.ADCTRL2.all |= ADCTRL2_INIT_STATE;     // Set up ADCTRL2 register

    AdcRegs.ADCMAXCONV.all = 0x0003;


    AdcRegs.ADCCHSELSEQ1.all = 0x4376;
    AdcRegs.ADCCHSELSEQ2.all = 0x5210;
    AdcRegs.ADCCHSELSEQ3.all = 0xBA98;
    AdcRegs.ADCCHSELSEQ4.all = 0xFEDC;


    EvaRegs.GPTCONA.bit.T1TOADC = 1;              // Set up EV Trigger with Timer1 UF

    //ADCcalibrationDriverInit(calibrate);


}

Thanks a lot!