A lot of wizardland codes refuse to work giving the excuse in the ticker that Realm of the Diggle Gods is not enabled. However this often happens with low level codes from long before level eleven. Also, if I have realm of the diggle gods installed, why should it matter for the porpose of wizardlands whether I have levels 11-15 enabled anyway?
Many of the room layouts for the wizardlands probably only exist in RotDG. If all troubleshooting fails, I would re-download the dlc.
The room layouts should all exist in CotW, this is definitely a bug. I wish GLG would let us turn off expansions for debugging.
Well, if the manual "move the expansion folder out of the directory" method counts as turning them off, then technically we can! (I am surprised at this, though. I thought all of these dependencies had been removed in 1.1.2...)