Help with Draconic evolution - Stabalized mob spawner

[Plainy]

So I've used about 3 wither souls which are a ***** to get!
And the mob spawer doesnt seem to be wanting to accept it.
I have the core thing in there but the soul refuses it justt spawns there for some reason when I right click the spawner.
I tested with a normal MC spawner and worked fine in the overworld so what the hell am i doing wrong?

 

[adamich]

there is two upgrades for spawners:
first one remove option "player must be in range".
second remove light and world options.
R U install both?