Do you mean when you turn on/off auto-cast abilities ??
Then you need to use orders, like here's an example with searing arrows:
Trigger:
Auto Cast
Events
Unit - A unit Is issued an order with no target
Conditions
Actions
If (All Conditions are True) then do (Then Actions) else do (Else Actions)
If - Conditions
(Issued order) Equal to (Order(flamingarrows))
Then - Actions
Game - Display to (All players) the text: ((Name of (Triggering unit)) + ( ( + ((Proper name of (Triggering unit)) + ( ) + has turned on Searing Arrows!))))
Else - Actions
If (All Conditions are True) then do (Then Actions) else do (Else Actions)
If - Conditions
(Issued order) Equal to (Order(unflamingarrows))
Then - Actions
Game - Display to (All players) the text: ((Name of (Triggering unit)) + ( ( + ((Proper name of (Triggering unit)) + ( ) + has turned off Searing Arrows!))))
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.