Reload maps not working

[XtC]

I cant seem to load new maps using reload maps button.
I have way more maps in my maps folder than it lets me use. For example i have tabula in my maps folder but i cant play the map cos it doesnt show up in the map list.

I have searched my entire comp for another maps folder and there is no other. Just 1..which is being stupid. Any1 else had any probs like this? and if so how did u fix it?