Shouldnt this code make all leds on PORTB blink?
Now its only one led thats blink (PORTB.1)

Code:
@   device  pic16F648A, hs_osc, wdt_off, mclr_on, lvp_off, protect_off
DEFINE OSC 20


loop:

        high PORTB = %11111111
        pause 250
        low PORTB = %11111111
        pause 250
        goto loop
        end