pwm with interrupt not work

[abolfazlk873]

hi everybody
following program is written for dspic33ep256mu806 by microC pro for dspic . the purpose of program is generating pwm output.
in my program pwm generator 1 is set to work and independent interrupt for pwm generator 1 is set to work .
pwm generator 1 is work but interrupt doesn't work .
in my last program i was using the Special event interrupt and it works well. but i need to use 1 interrupt for each pwm generator.
Any help is appreciated .
compiler : microC pro for dspic
my program :

/////////GLOBAL defined
#define  test_periode   364                     // Diagnostic frequency = 3 KHz
#define  test_duty      160
#define  test_sev       155
#define  work_periode   54687               // Work frequency = 20 Hz
#define  work_duty      4000
#define  work_sev       16770
         
///////GLOBAL FUNCTION////////////////////
void power_up_pwm(void);
void IER_1 (void);
void ADC_initial (void);
/////
static unsigned int ADCValues_1[4] = {0, 0, 0, 0};
static char value[8] ;

//////// ISR //////////////////////////////

void pwm_1() iv IVT_ADDR_PWM1INTERRUPT ics ICS_AUTO {
     while( !AD1CON1bits.DONE );
     AD1CON1bits.DONE=0;
     ADCValues_1[1] = ADC1BUF0;     // Read the AN0 conversion result

     IntToStr( ADCValues_1[1], value);

     IFS5bits.PWM1IF=0;
     return;
}

///////MAIN FUNCTION/////////////////////
void main()
{
////////OSCILLATOR CONFIGURATION   Fosc=70 MHz
             CLKDIV.DOZE_0=0;
             CLKDIV.DOZE_1=0;
             CLKDIV.DOZE_2=0;

             CLKDIV.PLLPRE_0=0;        //0+2
             CLKDIV.PLLPRE_1=0;
             CLKDIV.PLLPRE_2=0;
             CLKDIV.PLLPRE_3=0;
             CLKDIV.PLLPRE_4=0;

             CLKDIV.PLLPOST_0=1;      //2(1+1)
             CLKDIV.PLLPOST_1=0;

             PLLFBD=0x0044;           //68+2  

/////////PIN CONFIGURATION
              RPINR12 = 0x7677;  // fault inputs
              RPINR18 = 0x0047;  // uart1 receive
              RPOR3 = 0x0001;     // uart1 tx
////////
              ANSELB=0x01df;
              ANSELC=0x0000;
              ANSELD=0x0000;
              ANSELE=0x0000;
              ANSELG=0x0000;
////////
              TRISB=0xf9df;
              TRISC=0x1000;
              TRISD=0x0088;
              TRISE=0x0000;
              TRISF.B1=0;
              TRISG.B8=0;
              TRISG.B9=0;
///////// pwm configuration
              UART1_Init(115200);
              ADC_initial ();
              IER_1 ();
              power_up_pwm();
              while(1){
                        UART1_Write(13);
                        UART1_Write_Text("phase_1:");
                        UART1_Write_Text(value);
              }

}

void power_up_pwm(void){
              SPHASE1 = test_periode;
              /* Set Duty Cycles */
              SDC1 = test_duty;
              /* Set Dead Time Values */
              DTR1 = DTR2 = DTR3 = 0;
              ALTDTR1 = ALTDTR2 = ALTDTR3 = 0;
              /* Set PWM Mode to Independent */
              IOCON1 = IOCON2 = IOCON3 = 0x4C00;
              /* PHASEx/SPHASEx registers provide time base period for this
                 PWM generator,Edge-Aligned Mode and independent Duty Cycles , enable trigger for interrupt */
              PWMCON1 = PWMCON2 = PWMCON3 = 0x0601;
              /* Configure Faults */
              FCLCON1 = FCLCON2 = FCLCON3 = 0x0003;
              /* 64:1 Prescaler */
              PTCON2 = 6;
              /* ADC Special Event Trigger Configuration */
              TRIG1 = test_sev;                                       /* Event Trigger value  */
              TRGCON1bits.TRGDIV = 0;                      /* Event Trigger output postscaler set to 1:1 selection */
              TRGCON1bits.TRGSTRT =0;
              /* Enable PWM Module ,  event interrupt is enabled */
              PTCON = 0x8400;
}

void IER_1 (void){
     /* Enable level 1-7 interrupts */
     INTCON2bits.GIE=1;
     /* Interrupt nesting enabled here */
     INTCON1bits.NSTDIS = 0;
     /* Set PWM1  Event Match interrupt priority*/
     IPC23bits.PWM1IP=7;
     /* Reset PWM1  Event Match interrupt flag */
     IFS5bits.PWM1IF=0;
     /* Enable PWM1  Event Match interrupt */
     IEC5bits.PWM1IE=1;
     return;
}

void ADC_initial (void){
                AD1CON1 = 0x0010;     	// PWM Generator 1 primary trigger compare ends sampling and starts
                AD1CON2 = 0x0000;
                AD1CON3 = 0x008B;
                AD1CON4 = 0x0000;
                AD1CHS0 = 0x0000;     	// select AN0 for convert
                AD1CHS123 = 0x0000;
                AD1CSSH = 0x0000;
                AD1CSSL = 0x0000;
                AD1CON1bits.ADON = 1;       // Turn on the A/D converter
                Delay_us(10);

}