building AI in squad problem

posted this in another forum but then saw that theres a modding forum. so ill try here.

im trying to build a AI system in the Squad modding editor. I opened up “logar valley AAS-!” map and in there I drag out a navmesh. then I tried to press P, build geometry, restart the editor, move meshes around, put “block all” on the landscape and none of it seems to make the navmesh visible, and I dont think its active either! is it a issue with the “logar valley” map? because it works in the default map that the squad editor starts up with.