Unable to execute interrupt function - pic

Question

Using Mplab ide 5.10 and xc8 compiler for the pic18f4550 I am unable to get the code to get into the interrupt function the goal is to get J to count up in the background until something trigger it to output a value in the lcd. Currently only the lcd display the first message and using ICD 3 the value of J does not change and does not look like the program runs the interrupt function at all
#define _XTAL_FREQ 48000000
#include <xc.h>
#include <stdio.h>
#include <stdlib.h>
#include "lcd.h"
unsigned char j, output = 0, i, outchar;
char buffer[2] = " ";
char Message[ ] = "Hands Position ";
void interrupt timer0_isr();
void lcd_write_cmd(unsigned char cmd);
void lcd_write_data(unsigned char data);
void lcd_strobe(void); // Generate the E pulse
void lcd_init(void);
void interrupt timer0_ISR() // Timer0 Interrupt Service Routine (ISR)
{
if (INTCONbits.TMR0IF) // TMR0IF:- Timer0 Overflow Interrupt Flag Bit
{
TMR0H = 0x48; // Timer0 start value = 0x48E5 for 1 second
TMR0L = 0xE5;
PORTCbits.RC1 = !PORTCbits.RC1; /* external timing check - toggle every 1ms */
if (j <= 4) { //limit up to 7
j++; // Increase count by 1
PORTB = j; // Output to Demultiplexer
} else {
j = 0; // Reset count aftwr it hit 7
PORTB = j; // Output to Demultiplexer
}
INTCONbits.TMR0IF = 0; // Reset TMR0IF at interrupt end
}
}
void main(void) // Main Function
{
ADCON1 = 0x0F;
CMCON = 0x07;
RCONbits.IPEN = 1; // Bit7 Interrupt Priority Enable Bit
INTCONbits.GIEH = 1; // Bit7 Global Interrupt Enable bit
INTCONbits.GIEL = 0; /* turn on low & high interrupts */
T0CONbits.TMR0ON = 1; // Turn on timer
T0CON = 0b00000111; // bit7:0 Stop Timer0
// bit6:0 Timer0 as 16 bit timer
// bit5:0 Clock source is internal
// bit4:0 Increment on lo to hi transition on TOCKI pin
// bit3:0 Prescaler output is assigned to Timer0
// bit2-bit0:111 1:256 prescaler
INTCON2 = 0b10000100; // bit7 :PORTB Pull-Up Enable bit
// 1 All PORTB pull-ups are disabled
// bit2 :TMR0 Overflow Int Priority Bit
// 1 High Priority
TMR0H = 0x48; // Initialising TMR0H
TMR0L = 0xE5; // Initialising TMR0L for 1 second interrupt
INTCONbits.TMR0IE = 1; // bit5 TMR0 Overflow Int Enable bit
INTCONbits.TMR0IF = 0; // bit2 TMR0 Overflow Int Flag bit
// 0 TMR0 register did not overflow
TRISC = 0; /* all outputs */
TRISAbits.TRISA5 = 1; // RA5 is the check for signal from input Multiplexer.
TRISAbits.TRISA0 = 0; // RA0, RA1 & RA2 output to arduino
TRISAbits.TRISA1 = 0;
TRISAbits.TRISA2 = 0;
TRISD = 0x00; // PortD connects to Demultiplexer
TRISB = 0;
lcd_init(); // LCD init
lcd_write_cmd(0x80); // Cursor set at line 1 positon 1
for (i = 0; i < 16; i++) {
outchar = Message[i]; // Store Message in outchar
lcd_write_data(outchar); // Display Message
}
__delay_ms(100);
PORTD = 0x00; // Clear PortD
PORTB = 0;
j = 0; // Start count from 0
while (1) // Main Process
{
if (PORTAbits.RA5 == 1) { // If RA3 detect a signal
switch (j) { // Switch case to determine hand position & output to RA0, RA1 & RA2 to transmit to arduino
case(0):
output = 10;
PORTAbits.RA0 = 0;
PORTAbits.RA1 = 0;
PORTAbits.RA2 = 0;
break;
case(1):
output = 20;
PORTAbits.RA0 = 1;
PORTAbits.RA1 = 0;
PORTAbits.RA2 = 0;
break;
case(2):
output = 30;
PORTAbits.RA0 = 0;
PORTAbits.RA1 = 1;
PORTAbits.RA2 = 0;
break;
case(3):
output = 40;
PORTAbits.RA0 = 1;
PORTAbits.RA1 = 1;
PORTAbits.RA2 = 0;
break;
case(4):
output = 50;
PORTAbits.RA0 = 0;
PORTAbits.RA1 = 0;
PORTAbits.RA2 = 1;
break;
}
lcd_write_cmd(0xC0); // Cursor set at line 2 positon 1
sprintf(buffer, "%d", output); // Convert numbers to character
for (i = 0; i < 2; i++)
lcd_write_data(buffer[i]); // Display Hand Position
}
}
}