[QUOTE=NURULHAIZA;90813]i have change the port and still the same...

I am not sure that this was the answer to your question - the problem is that you are stuck in item 1 of your menu largely because you are polling your buttons for a few microseconds every 5 seconds - not much hope of happening to be pressing at the right time:
main:
if portB.1=1 then 'arrow down TAKES A FEW MICROSECONDS
push = push+1 : goto selection : endif
if portA.1=1 then 'arrow up
push = push-1 : goto selection : endif
pause 5000 'DO NOTHING FOR 5 SECONDS
goto main
I suggest you have a much shorter pause (eg PAUSE 50) and it may be more responsive!

Also it is not clear you have made portB.1 an input - I like to use
INPUT portB.1
but you could also use the TRIS register also

Peter