Making timer using DT_INT, problem with LCD (Using it first time)

Hi, I am using a LCD for the first time so please forgive me for any mistakes and I have searched few threads and picked up few pieces to put together.
This is my code:

Code:

INCLUDE "modedefs.bas" INCLUDE "DT_INTS-14.bas" ; Base Interrupt System INCLUDE "ReEnterPBP.bas" ; Include if using PBP interrupts DEFINE OSC 4 DEFINE LCD_DREG PORTB DEFINE LCD_DBIT 0 DEFINE LCD_RSREG PORTB DEFINE LCD_RSBIT 4 DEFINE LCD_EREG PORTB DEFINE LCD_EBIT 5 DEFINE LCD_BITS 4 DEFINE LCD_LINES 2 DEFINE LCD_COMMANDUS 1500 DEFINE LCD_DATAUS 44 sec var byte minu var byte hrs var byte days var word ADCON1=7 CMCON=7 OPTION_REG=128 TRISA=0 : PORTA=0 TRISB=0 : PORTB=0 TRISC=0 : PORTC=0 TRISD=0 : PORTD=0 TRISE=0 : PORTE=0 CCP1CON=0 @ ERRORLEVEL -306 wsave VAR BYTE $70 SYSTEM ' alternate save location for W gosub reset ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, _counting, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM T1CON=%00110000 TMR1L=%11011100 TMR1H=%00001011 @ INT_ENABLE TMR1_INT ; enable external (INT) interrupts PAUSE 1000 Main3: LCDOUT "HELLO" ;$FE,1,2, DEC days,"d-",DEC2 hrs,":",DEC2 Minu,":",DEC2 Sec GOTO Main3 RESET: sec=0 : minu=0 : hrs=0 : days=0 return '---[INT - interrupt handler]--------------------------------------------------- counting: sec=sec+1 if sec =120 then sec=0 minu=minu+1 if minu=120 then minu=0 hrs=hrs+1 if hrs=48 then hrs=0 days=days+1 endif endif endif TMR1L=%11011100 TMR1H=%00001011 @ INT_RETURN

I am aware there is an elapsed timer file which can do this, but I am in a spirit of doing something myself. Once I am able to control the LCD properly, I will be trying to modify the main code to make my own 7 days timer.
I am using 16F877A and the connections page snapshot of the LCD is attached. I am using Matrix Multimedia's development board.
Thanks in advance.