Ammo Reload Help

well i made a ammo system and i made a trigger that when you use an item it adds 30 to ammo... here it is

Arrows
Events
Unit - A unit Uses an item
Conditions
(Item-type of (Item being manipulated)) Equal to Arrows
Actions
Set Ammo = (Ammo + 30)

but i based arrows (the item) off of potion... but nothing happens when i use the item the item doesn't even dissapear

You based the item off a potion... but you removed it's life gain ability? If you did, that could be the reason for it not working, an item needs an activated ability in order to work.

oh yea you're right i did remove that thanks a bunch