MSP430F2132: Unable to generate ADC10 conversion complete interrupt

  //================================ Setup the ADC10 ================================

  //   These bits select the channel for a single-conversion sequence, beginning with the highest channel.

  //

  //  Analog to Digital Converter (ADC) initialization.

  ADC10CTL1 = 0;  // Shutdown ADC10

  ADC10CTL0 = 0;

  ADC10AE0  |= 0x3F;                             // Set P3.0 and P2.4 through P2.0 pins as inputs to ADC.

  ADC10CTL1  = INCH_5 + ADC10DIV_7 + ADC10SSEL_1 + CONSEQ_1;   // Select maximum channel number in sequence (A5)

  ADC10CTL0  = ADC10SHT_3 + ADC10ON;             // Select Vcc as the positive referance voltage.

  ADC10CTL0 |= (ADC10IE);                 // Start up ADC block conversion state machine.

  ADC10CTL0 |= (ENC + ADC10SC);

  // Fresh start, initialize all the flags.

  ADC_Flags      = 0;            // Clear ADC flags.

  System_Flags   = 0;

/* -----------------------------------------

 *  NAME: evADC_isr

 *

 *  DESCRIPTION:

 *    Conversion done for the ADC

 *    set variest process flags

 *

 *

 * ------------------------------------------*/

#pragma vector = ADC10_VECTOR

__interrupt void evADC_isr(void)

{

  _DINT();

  ADC_Flags   |= ADC_CC;        // Set conversion complete flag

  ADC10CTL0   &= ~(ADC10IFG);   // Clear ADC conversion complete interrupt flag

  Analog_data  = ADC10MEM;      // Save data from ADC in temporary buffer

  ADC10CTL0   &= ~ADC10SC;      // Start next conversion.

  _EINT();

}