How to get the caster upgrade icon to show?

I turned the Shade into a caster unit complete with its own upgrades. They all work, but I can't get the caster upgrade icon to show on the unit.

I already assigned its own caster upgrade icon, levels and tips. They still won't show.

Errr... i think there is a thing in the screen that says: Caster Upgrade art- None
CHnage this to whatever you want!
(Oh, and they cant have 2 attacks :) )

-Garith

I copied all the caster gui stats from the bashee. Duh.

It just won't show.