LUI side bars.
 

Hey, my Friend showed me this new UI called LUI, I've recently downloaded and I'm almost finished setting it all up, there's just one problem i have, when I open the side bars to drag abilities from my Spell book into it, they don't seem to go in it. The side bar open's and close's properly, it just doesn't seem to be holding my Abilities in there.

Is there somthing I have to do before i can put abilities in there?