Hi, I am back again with a problem. This time it looks like the interrupt is serviced but only once and code does not move forward. Can you please have a look at my code and advise me if I am doing it right ?

Code:
Define          OSC     4      ' OSCCON defaults to 4MHz on reset

INCLUDE "DT_INTS-14.bas"     ; Base Interrupt System
INCLUDE "ReEnterPBP.bas"     ; Include if using PBP interrupts
Include "modedefs.bas"

@ __CONFIG _INTRC_OSC_NOCLKOUT & _WDT_ON & _PWRTE_ON & _MCLRE_OFF & _CP_ON & _BOD_ON & _CPD_ON & _IESO_OFF & _FCMEN_ON & _WUREN_OFF

' Pin Definations are here
ToTx  	             var     GPIO.2     
ToRx		var	GPIO.3
Monitor		var  	GPIO.4
T1CON=49
main:
        ' Initialize the processor
        TRISIO = %011000        
        CMCON0 = 7              
        GPIO=0			       
        OPTION_REG = %00000111  
        WDA.4=1  : WPUDA.4=1
ASM
INT_LIST  macro    ; IntSource,    Label,  Type, ResetFlag?
       INT_Handler    TMR1_INT,  _Setval,   PBP,  yes
   endm
	INT_CREATE               ; Creates the interrupt processor
ENDASM

start0:
gpio.0=1 ' LED1

start:
		gpio.1=1 ' LED 2
@   INT_ENABLE   TMR1_INT
		Serin ToRx, N2400,["pp3"],code
@   INT_DISABLE   TMR1_INT
                           if code=0 then goto start0
                           ' ELSE CHECK OTHER VALUES FOR THE RECEIVED CODE
goto start0

Setval:
     code=0
	gpio.0=0 : pause 200
@ INT_RETURN
When power is applied this is what happens:
1) Both LED1 & LED2 glow
2) LED 1 (gpio.0) goes off
and system stays like this though LED should turn ON after 200mS. Please help me know what am I doing wrong?