what's wrong with this interrupt

[micro]

i solved the problem with another method as below


trisa=%00000
trisb=%11111111

option_reg=%10000000
intcon = %10001000
I var byte

on interrupt goto int

main:
back: if portb<>0 then intcon=%10001000 ; test bit 3
serout porta.0,2,[254,1]
pause 10
serout porta.0,2,["Hello"]
pause 100
goto main

disable interrupt

int:

for i=0 to 5

serout porta.0,2,[254,1]
pause 10
serout porta.0,2,[#i]
pause 1000

next i

INTCON=%10000000 ; cleared bit 3 bit
goto back ; back to test
resume
enable interrupt
end


i will read document, thank u for that, and waiting a reply from Mister_e