first off all you forgot to clear int flag
in your int handler so your PIC will always
be in interrupt routine. you have to put line
Code:
bcf INTCON,1
before retfie instruction.
also I suggest you to turn on and off
LED in int routine with little delay
in between (although it is not adviceable to use
delays in interrupt)
to see the interrupt more clearly. you can
use this int handler for example:

Code:
asm
int_handler
    ; Save Resisters ;
    movwf   wsave               ; Save W Register into wsave
    swapf   STATUS,W            ; Save STATUS Register into ssave
    clrf    STATUS                  
    movwf   ssave              
    movf    PCLATH,W            ; Save PCLATH Register into psave
    movwf   psave
    movf    FSR,W               ; Save FSR Register into fsave
    movwf   fsave
endasm
    high LED
    pause 100
    low LED
    ; Interrupt Code ;
    ;bsf     _LED                ; Turn on LED
asm
    ; Restore Resisters ;
    movf    fsave,W             ; Restore FSR Resister
    movwf   FSR                 
    movf    psave,W             ; Restore PCLATH Resister
    movwf   PCLATH
    swapf   ssave,W             ; Restore STATUS Resister
    movwf   STATUS
    swapf   wsave,F             ; Restore W Resister
    swapf   wsave,W
    bcf INTCON,1
    retfie
endasm