PIC32 pin config problem?

[nick703]

I have completed rotary encoder configuration to toggle led to other pin of pic32mx575f256h.
in given datasheet (diagram is below ) i have configure micro controller pin no. 2 & 3 (RE6 AND RE7) to the encoder. and output to pin no.64 % 63 (RE3 AND RE4). every thing working right. but when i chenged encoder to pin no. 17 & 18 (RB6 AND RB7) so output to led is not toggling.
and i also marked that even i try to all black part (means 5v tolerant) of pic pin as a input of encoder then working perfectly .



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hear is the code .

#INCLUDE<plib.h>
  
#define mLED1on()  (LATESET = BIT_4)
#define mLED1off()  ( LATECLR= BIT_4)
#define mLED2on()  (LATESET = BIT_3)
#define mLED2off()  (LATECLR = BIT_3)

  
int oldvalue = 0;
  
void InitializePorts(void)
{
    TRISEBits.TRISE6 = 1 ;                  // make as a input for encoder
    TRISEBits.TRISE7 = 1 ;                  // make as a input for encoder
    TRISEBits.TRISE3 = 0 ;                  // make as an output for led1
    TRISEBits.TRISE4 = 0 ;                  // make as an output for led2
    
    return;
}

void InitializeLed(void)
{
    mLED1off();
    mLED2off();
    return;
}

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

    if(value & 0x40)                        
    { 
        if (newvalue & 0x40)                    
        { 
            if (newvalue & 0x80)                 
            { 
                mLED1on() ;            
            } 
            else                           
            { 
                mLED2on() ;          
            } 
            
            Delay(20); 
           
        }
    }
    oldvalue = newvalue;                             // save current port status
    return;
}

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

that working perfect but not other port like portb and also configured portb as same as port e.