Rotery Enoder and Stepper Motor Problem

#INCLUDE<plib.h>

#define          MS_1                 BIT_1                                 //   Microstepping bit
#define          MS_2                 BIT_2

#define          stepperAquater()           (LATBSET = MS_1 , LATBCLR = MS_2 )  
#define          stepperAeighth()           (LATBSET = MS_1 , LATBSET = MS_2 )  
#define          stepperAhalf()              (LATBCLR = MS_1 , LATBSET = MS_2 )

#define mstepperAdis()  (LATECLR = BIT_4)
#define mstepperAena()  (LATESET = BIT_4)
#define mstepperArev()  (LATECLR = BIT_5)
#define mstepperAfor()  (LATESET = BIT_5)
#define mstepperAoff()  (LATECLR = BIT_6)
#define mstepperAon()   (LATESET = BIT_6)
  
int old = 0;
  
void InitializePorts(void)
{
    TRISEBits.TRISE2 = 1 ;                  // make as a input for encoder
    TRISEBits.TRISE3 = 1 ;                  // make as a input for encoder
    TRISEBits.TRISE4 = 0 ;                  // make as an output for stepper motor
    TRISEBits.TRISE5 = 0 ;                  // make as an output for stepper motor
    TRISEBits.TRISE6 = 0 ;                  // make as an output for stepper motor
    return;
}

void InitializeStepper(void)
{
    mstepperAoff();                         // stepper off
    mstepperAfor() ;                        // stepper forward
    mstepperAena() ;                        // stepper enable
    return;
}

void Encoder (void)
{
    int new = 0 ;
    int value = 0 ; 
    
    new = PORTE ;                           // read the current port status
    value = new ^ old ;                     // flag each port bit that has changed

    if(value & 0x08)                        // if bit 3 has changed since last time
    { 
        if (new & 0x08)                     // if bit 3 is set
        { 
            if (new & 0x04)                 // if bit 2 is set
            { 
                mstepperAfor() ;            // stepper forward
            } 
            else                            // else bit 3 is clear
            { 
                mstepperArev() ;            // stepper reverse
            } 
            stepperAhalf();
            mstepperAon();                  // stepper on
            Delay(20); 
            mstepperAoff();                 // stepper off
        }
    }
    old = new;                             // save current port status
    return;
}

void main(void)
{
    InitializePorts();
    InitializeStepper();
    while(1)
    {
        Encoder();
    }
}