WRITE TO Eeprom

[kindred22]

trisb=0
portb=0
aa var byte
bb var byte

eeprom 2,[0]
aa=4

write 2, aa
read 2, bb

if bb==4 then
portb.0=1
endif

I tried 16f84a it function, the LED at portb.0 lights up..
but in 16f877a, the LED did not light...
what happen to this situation?
is there a need to disable interrupts?
with that simple program....

HELP US PLS....
thnx....

[skimask]

1 - which version of PBP are you using?
2 - what clock speed are you trying to run with?
3 - which programmer are you using?

[ria_river]

from kindred:
picbasic pro compiler version 2.3
4MHz
kit128

[skimask]

from kindred:
picbasic pro compiler version 2.3
4MHz
kit128

PBP 2.3? Upgrade to 2.50a... $20 says you can't do it!
877A support isn't in 2.3 according to melabs support page.