function lvlUPNG ()
player = getLocalPlayer()
local x,y,z = getElementPosition(player)
setElementHealth ( player, getElementHealth(player) + 100 )
exports.infection:giveantivirus()
local sound = playSound3D ( "levelup.ogg",x,y,z )
attachElements (sound, player)
end
addEvent("lvlUP", true)
addEventHandler("lvlUP", root,lvlUPNG)
try this. if no work, show how you trigger this event.