Solved Spell duration

[jazonas]

Welcome again.
I need help with my spell. Ive got a trap spell but i don't know how to change duration of trap.
Here is code:

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_EARTH)
setCombatParam(combat, COMBAT_PARAM_CREATEITEM, 1499)
local arr = {
{1, 1, 1},
{1, 2, 1},
{1, 1, 1}
}
local area = createCombatArea(arr)
setCombatArea(combat, area)
function onCastSpell(cid, var)
	return doCombat(cid, combat, var)
end

and

	<instant name="Trap Spell" words="make trap" lvl="1" mana="20" prem="0" range="5" casterTargetOrDirection="1" blockwalls="1" exhaustion="2000" needlearn="0" event="script" value="trap.lua">
		<vocation id="1"/>
	</instant>

I tried with word "duration" but it don't work. Please help. Greetings.

 

[Limos]

items.xml

	<item id="1499" article="a" name="rush wood">
		<attribute key="type" value="magicfield" />
		<attribute key="decayTo" value="0" />
		<attribute key="duration" value="45" />
	</item>

 

[jazonas]

It's working. THANKS