[SOLVED] Simple EEPROM writing and Reading in PIC18F4550

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Hello!! Yesterday i write a code for PIC16F877A for reading and writing data to EEPROM

#include<htc.h>
#include<string.h>

#define _XTAL_FREQ 20000000

void EEPROM_Write();
void EEPROM_Write_String(unsigned char [],unsigned char address);
unsigned char EEPROM_Read();

unsigned int len,i;
void main()
{
    unsigned char x;
    TRISB = 0x00;
    //Writing Operation
    EEPROM_Write_String("EMBEDDED LABORATORY!!",0);    //Message String and Starting Address
    EECON1bits.WREN = 0;    //EEPROM Write Disable
    //Reading the Data at 0x0 EEPROM Address
    EEADR = 0x0;
    x = EEPROM_Read();
    PORTB = x;
    while(1);
}   

void EEPROM_Write()
{
    EECON1bits.EEPGD = 0;    //Point to EEPROM
    EECON1bits.WREN = 1;    //EEPROM Write Enable Bit
    INTCONbits.GIE = 0;        //Disable all Interrupts
    EECON2 = 0x55;
    EECON2 = 0xAA;
    EECON1bits.WR = 1;
    INTCONbits.GIE = 1;
    while(!PIR2bits.EEIF);
    PIR2bits.EEIF = 0;
}

void EEPROM_Write_String(unsigned char msg[],unsigned char address)
{
    len = strlen(msg);
    for(i=0;i<len;i++)
    {
        EEADR = address + i;
        EEDATA = msg[i];
        EEPROM_Write(msg[i]);
    }
}

unsigned char EEPROM_Read()
{
    EECON1bits.EEPGD = 0;    //Point to EEPROM
    EECON1bits.RD = 1;        //EEPROM Read Enable Bit
    return(EEDATA);
}

It works fine...

But when today i tried the Same thing for PIC18F4550 it didn't work..
Here is my code

#include <htc.h>
#include <string.h>
#include "delay.h"

/**********CONFIGURATION BITS SETTING**********/
#pragma config FOSC = HSPLL_HS	// Using 20 MHz crystal with PLL
#pragma config PLLDIV = 5     	// Divide by 5 to provide the 96 MHz PLL with 4 MHz input
#pragma config CPUDIV = OSC1_PLL2 // Divide 96 MHz PLL output by 2 to get 48 MHz system clock
#pragma config FCMEN = OFF	 // Disable Fail-Safe Clock Monitor
#pragma config IESO = OFF  	// Disable Oscillator Switchover mode
#pragma config PWRT = OFF 	 // Disable Power-up timer
#pragma config BOR = OFF   	// Disable Brown-out reset
#pragma config WDT = OFF  	 // Disable Watchdog timer
#pragma config MCLRE = ON  // Enable MCLR Enable
#pragma config LVP = OFF   // Disable low voltage ICSP
#pragma config ICPRT = OFF // Disable dedicated programming port (only on 44-pin devices)
#pragma config CP0 = OFF   // Disable Code Protection Bit
/************************************************/

void EEPROM_Write();
void EEPROM_Write_String(unsigned char [],unsigned char address);
unsigned char EEPROM_Read();

unsigned char x,len,i;
void main() @ 0x0000A0
{
	EEPROM_Write_String("EMBEDDED LABORATORY!!!!",0);
	//Message String and Starting Address
	EECON1bits.WREN = 0;	//Disable Writing to EEPROM
	//Reading the Data at 0x0 EEPROM Address
	EEADR = 0x0;
	x = EEPROM_Read();
	while(1);	
}

void EEPROM_Write()
{
	EECON1bits.EEPGD = 0;	//Points to EEPROM
	EECON1bits.CFGS = 0;	//Points to Flash and EEPROM
	EECON1bits.WREN = 1;	//EEPROM Write Enable bit
	INTCONbits.GIE = 0;		//Disable all Interrupts
	EECON2 = 0x55;
	EECON2 = 0xAA;
	INTCONbits.GIE = 1;		//Enable Interrupts again
	while(!PIR2bits.EEIF);
        PIR2bits.EEIF = 0;
}

void EEPROM_Write_String(unsigned char msg[],unsigned char address)
{
	len = strlen(msg);
	for(i=0;i<len;i++)
	{
		EEADR = address + i;
		EEDATA = msg[i];
		EEPROM_Write(msg[i]);
	}
}

unsigned char EEPROM_Read()
{
	EECON1bits.EEPGD = 0;	//Point to EEPROM
	EECON1bits.CFGS = 0;	//Points to Flash and EEPROM
	EECON1bits.RD = 1;		//EEPROM Read Enable Bit
	return(EEDATA);
}

But this doesn't work
but after giving some delay

INTCONbits.GIE = 1; //Enable Interrupts again
while(!PIR2bits.EEIF);
PIR2bits.EEIF = 0;

replacing above with
INTCONbits.GIE = 1; //Enable Interrupts again
DelayMs(100);


Everything works fine

Pls help

Thanks in advance