Accelerometer value works only in property not in script

On Tizen Active 2 Watch the tag {say}, {sax} and {saz} does not work into the script. but it works in to a Property "Opacity"
example: {say}>5 and 0 or 100 -> THIS WORKS IN PROPERTY
if {say}>5 then
o1=0
else
o1=100
end -> DOESN'T WORK

Please let it also work in script.
Thanks