Modifying Silence

I am going to have a unit gain silence (modified so it disables attack) and cast it on himself. Only i have 1 problem. Even though i only have "self" for the targets aloud, it wont work. I decided to check all of the boxes (except for friend and enemy and not self), and it worked on my other units, but still not on the caste.

How can i get it to target only himself and no one else?!?!?

If casting on self won't work, why not make a trigger that create/move dummy caster that belongs to enemy hostile and make it cast slience on the casting hero? reduce the area of effect to the size abit greater than the hero's collision.

Other suggestions, may not work to your likings, try banish, ensnare, or entangle.

Im using it to stop a unit from attacking. I tried entange, but i couldnt get it to stop holding a guy in his place.

how about a slow, but only on attack speed and make it 100% slower, ie not attacking?

The only problem is that i dont want them to be able to use abilities either.

ah sorry, i didnt know that.
hmm, i dont know why it isnt working for you, it should be

modify the silence to disable everything....but beware, the hero cannot cast it on himself cuz it will crash WC3 (at least that happened to me in v1.12) and i think i know why, when he starts casting it, it disables everything so he cannot finish the casting, thus the spell is not cast, thus all units should have their attacks and abilities...and they do not...
so i suggest to create a dummy-caster, switch it to neutral hostile, order it to cast silence upon players and remove it from the game...also chech the target "not-self"....