Am I overlooking the obvious here? What the hell is wrong?

[Stonemonk]

I'm trying to make a map, where it is impossible for a unit to auto- acquire units, and you've got to right click on each individual unit to attack it, however the map editor doesn't seem to want to let me do this.
I've tried the obvious- setting the acquisition range of all units to 0, which doesn't work.
I've tried triggers- so that whenever a unit auto acquires a target, order it to stop. -and-
Every 0.01 seconds run trigger- set all units acquisition range to 0, neither of which work!
i'm not great with triggers so if there's another way of doing it, help would be appreciated.

Am i managing to avoid doing something blindingly obvious? :?
Please help!!

 

[{AR}Nazuel]

try setting the aqui-range to 0.01 ...

 

[Stonemonk]

That doesn't work either, tried that too.

 

[Merywhether]

you might

you might have to give each unit an attack ability and make it so that they have no actually attack just an ability like in archery tactics if you have played that....