Default [Q] SoftKey mods on themed xperia

Hey guys,
I am wondering how to change the SoftKeyZ on my Sony Xperia M C1905. I used an app called SoftKeyZ and changed them to the ones I had made. However it only changed the effect when you press a button. I am using a theme called Woody. The softkeys are nice, but NOTHING CHANGED!!! Only things change when i change the theme to deafult. My actual question? How to I get custom Softkeys on a Xperia theme?
Specs:
Sony Xperia M C1905 rooted android 4.3 (15.4.1.9)