How to get Compiz wall desktop viewer to show more than 2 desktops?

How to get Compiz wall desktop viewer to show more than 2 desktops?

Since I've switched to KDE on my Ubuntu install (I guess for now I'm a Kubuntu guy) I can't see more than 2 of my virtual desktops in my Wall switcher. I can't even use the switcher to switch to the additional desktops, I have to select them with my mouse in the panel switcher.