If I make my code like this my three leds blinks..

Code:
loop: 

PORTB = %00000111
pause 250
PORTB = %00000000
pause 250

goto loop

END

BUT if I do it likes this does only PORTB.0 blink..
Why cant I do it like this?

Code:
loop:

HIGH PORTB.0
HIGH PORTB.1
HIGH PORTB.2
PAUSE 250
LOW PORTB.0
LOW PORTB.1
LOW PORTB.2
PAUSE 250

goto loop

END