Electronic – MPLAB XC8 vs MikroC problem

I have been trying to write a program for LCD on PIC18f452. I found a library and worked on it and MPLAB XC8 compiled it successfully. I tested it in ISIS and it showed perfect output. However, when I burned the program, the controller hardware refused to display anything. Then I ported the same code in MikroC – only made a slight change of replacing __delay_us and __delay_ms with available delay routines in MikroC. To my surprise, the Proteus as well as hardware worked as a charm.

I am confused that configuration bits are as same for both MPLAB and MikroC. Where does the difference lay? I suspect it has something to do with delay speed or so…

Code for main is as follows because its the thing that i change

#include <xc.h>
#include <p18f452.h>
#include "lcd.h"

#define _XTAL_FREQ 8000000L


// CONFIG1H
#pragma config OSC = HS         // Oscillator Selection bits (HS oscillator)
#pragma config OSCS = OFF       // Oscillator System Clock Switch Enable bit (Oscillator system clock switch option is disabled (main oscillator is source))

// CONFIG2L
#pragma config PWRT = OFF       // Power-up Timer Enable bit (PWRT disabled)
#pragma config BOR = ON         // Brown-out Reset Enable bit (Brown-out Reset enabled)
#pragma config BORV = 20        // Brown-out Reset Voltage bits (VBOR set to 2.0V)

// CONFIG2H
#pragma config WDT = OFF        // Watchdog Timer Enable bit (WDT disabled (control is placed on the SWDTEN bit))
#pragma config WDTPS = 128      // Watchdog Timer Postscale Select bits (1:128)

// CONFIG3H
#pragma config CCP2MUX = ON     // CCP2 Mux bit (CCP2 input/output is multiplexed with RC1)

// CONFIG4L
#pragma config STVR = ON        // Stack Full/Underflow Reset Enable bit (Stack Full/Underflow will cause RESET)
#pragma config LVP = ON         // Low Voltage ICSP Enable bit (Low Voltage ICSP enabled)

// CONFIG5L
#pragma config CP0 = OFF        // Code Protection bit (Block 0 (000200-001FFFh) not code protected)
#pragma config CP1 = OFF        // Code Protection bit (Block 1 (002000-003FFFh) not code protected)
#pragma config CP2 = OFF        // Code Protection bit (Block 2 (004000-005FFFh) not code protected)
#pragma config CP3 = OFF        // Code Protection bit (Block 3 (006000-007FFFh) not code protected)

// CONFIG5H
#pragma config CPB = OFF        // Boot Block Code Protection bit (Boot Block (000000-0001FFh) not code protected)
#pragma config CPD = OFF        // Data EEPROM Code Protection bit (Data EEPROM not code protected)

// CONFIG6L
#pragma config WRT0 = OFF       // Write Protection bit (Block 0 (000200-001FFFh) not write protected)
#pragma config WRT1 = OFF       // Write Protection bit (Block 1 (002000-003FFFh) not write protected)
#pragma config WRT2 = OFF       // Write Protection bit (Block 2 (004000-005FFFh) not write protected)
#pragma config WRT3 = OFF       // Write Protection bit (Block 3 (006000-007FFFh) not write protected)

// CONFIG6H
#pragma config WRTC = OFF       // Configuration Register Write Protection bit (Configuration registers (300000-3000FFh) not write protected)
#pragma config WRTB = OFF       // Boot Block Write Protection bit (Boot Block (000000-0001FFh) not write protected)
#pragma config WRTD = OFF       // Data EEPROM Write Protection bit (Data EEPROM not write protected)

// CONFIG7L
#pragma config EBTR0 = OFF      // Table Read Protection bit (Block 0 (000200-001FFFh) not protected from Table Reads executed in other blocks)
#pragma config EBTR1 = OFF      // Table Read Protection bit (Block 1 (002000-003FFFh) not protected from Table Reads executed in other blocks)
#pragma config EBTR2 = OFF      // Table Read Protection bit (Block 2 (004000-005FFFh) not protected from Table Reads executed in other blocks)
#pragma config EBTR3 = OFF      // Table Read Protection bit (Block 3 (006000-007FFFh) not protected from Table Reads executed in other blocks)

// CONFIG7H
#pragma config EBTRB = OFF      // Boot Block Table Read Protection bit (Boot Block (000000-0001FFh) not protected from Table Reads executed in other blocks)


//Simple Delay Routine
void Wait(unsigned int delay)
{
    for(;delay;delay--)
        __delay_us(100);
}

void main()
{
    //Let the Module start up
    Wait(500);
        PORTD = 0x00;
        TRISD = 0x00;

    //Initialize the LCD Module
    LCDInit(LS_BLINK);

    //Clear the Module
    LCDClear();

    //Write a string at current cursor pos
    LCDWriteString("F**k Yeh!!");

    Wait(20000);

    //Now Clear the display
    LCDClear();

    LCDWriteString("God Bless all !!");

    //Goto POS (X=0,Y=1 i.e. Line 2)
    //And Write a string
    LCDWriteStringXY(5,1,"<**************>");

    Wait(20000);

    //Write Some Numbers
    for(char i=0;i<100;i++)
    {
            LCDClear();
            LCDWriteInt(i,3);
            Wait(3000);
    }

    LCDClear();
    LCDWriteString("    The  End    ");

    //Loop Forever
    while(1)
        {
            PORTD = ~PORTD;
        }


}

Config bits seen by PICkit2 from hex files compiled my MPLAB and MikroC are