[Action] Ring that adds attack to weapon.

[Warmen ATS]

I'm trying to develop a ring that when equipped it adds attack points to the weapon I'm using. As for example, I am using a magic sword of attack 49, when I equip the ring it would go to 59 attack points and when I remove it, it would return to the original attack. I tried to create this script to put in movements:

function onEquip (cid, item, slot)
weapon = getPlayerWeapon (cid) .uid
darma = getItemAttack (weapon)
doPlayerSendCancel (cid, darma)

return true
end

More did not work, could anyone help me?