unitskillusepos, unitskilluseid

unitskillusepos and unitskilluseid do not working.

using this script[quote]
morocc,159,161,1 script testtesttest 111,{
unitskillusepos getnpcid(0),"WZ_STORMGUST",10,159,161;
end;
}[/quote]

based on document, it should cast Storm Gust at 159,161.

same as unitskilluseid,[quote]
morocc,159,161,1 script testtesttest 111,{
unitskilluseid getnpcid(0),"BA_POEMBRAGI",10;
end;
}[/quote]