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ADC interrupt not work.

Hello everybody. I'm currently working with a connected launchpad. I trying to program the ADC converter with a timer0 trigger, but I don't  can activate the ADC interrupt. The code is posted here 

//*****************************************************************************
//	Variable del reloj de sistema
//*****************************************************************************
uint32_t g_ui32SysClock;
 
//*****************************************************************************
//	Variables del programa
//*****************************************************************************
uint32_t g_ui32Flags = 0;
uint32_t adc_isr_count = 0;
uint32_t adc_result[2];
 
 
//*****************************************************************************
// Rutina de error
//*****************************************************************************
#ifdef DEBUG
void
__error__(char *pcFilename, uint32_t ui32Line)
{
}
#endif
 
//*****************************************************************************
// Código de interrupción del conversor analógico
//*****************************************************************************
void
AdcIsr0(void){
 
	// Borramos el flag de interrupción
	ADCIntClear(ADC0_BASE, 0);
	
	// Almacenamos en el vector adc_result el resultado de todas las conversiones
	ADCSequenceDataGet(ADC0_BASE, 0, adc_result);
	
	// Volteamos el pin PN0
	GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0, g_ui32Flags);
	g_ui32Flags = !g_ui32Flags;
	
	adc_isr_count++;
}
 
int
main(void)
{
    // Configuramos la velocidad del ARM en 120MHz
    g_ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
                                             SYSCTL_OSC_MAIN |
                                             SYSCTL_USE_PLL |
                                             SYSCTL_CFG_VCO_480), 120000000);
 
    // Habilitamos los perifércos que vamos a utilizar.
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPION);	// Puerto N para los leds
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);	// Puerto E para el canal analógico AN0
    SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);	// Timer0 para el disparo del timer
    SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);		// Conversor AD
 
    //Configuramos como salida el puerto PN0
    GPIOPinTypeGPIOOutput(GPIO_PORTN_BASE, GPIO_PIN_0);
 
    //Configuramos el timer 0.
    // Valor de recarga para 6khz = 120MHz / 20000
    TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC);
    TimerLoadSet(TIMER0_BASE, TIMER_A, 20000);	// 6khz
    TimerControlTrigger(TIMER0_BASE, TIMER_A, true);	// habilitamos el disparo del ADC mediante el timer0
 
    //Habilitamos el timer0
    TimerEnable(TIMER0_BASE, TIMER_A);
 
    //Configuramos el conversor AD
 
    GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_3); //Configuramos el canal 0
    GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_2); //Configuramos el canal 1
    ADCSequenceConfigure(ADC0_BASE, 0, ADC_TRIGGER_TIMER, 0);
    ADCSequenceStepConfigure(ADC0_BASE, 0, 0, ADC_CTL_CH2);
    ADCSequenceStepConfigure(ADC0_BASE, 0, 1, ADC_CTL_CH1|ADC_CTL_IE|ADC_CTL_END);
    IntEnable(INT_ADC0SS0);
    ADCIntEnable(ADC0_BASE, ADC_INT_SS0);
    IntMasterEnable();
    ADCSequenceEnable(ADC0_BASE, 0);
 
    //Bucle sin fin
    while(1)
    {
    }
}

I seems that the code is right.... but not work

Thanks!