Default Lg stock keyboard themes

Hello

I recently download stock LG keyboard apk from here

forum.xda-developers.com/xperia-u/themes-apps/apk-lg-stock-keybord-apk-t2654733

Its intended for the xperia U but works perfectly on my optimus g on cm10.2.The only problem is that themes dont work. The default theme is the only one that works.Anyone have any ideas how to get the theme working? I installed it as a normal apk.

Sent from my LG-E975