It's a custom item on an EQemu server. Might that be the problem? The weapon itself doesn't have a clicky, the click effect comes from the augment.

Yes,

that on the other hand always return "0" even though the timer of the augment clicky isn't refreshed yet

I'm currently trying : /echo ${FindItem[150501].TimerReady}

150501 = ID of an augment with a click effect which is inserted into my toon's mainhand weapon

It only echos "NULL"