When i download a map that i have played on my old computer on this computer it wont show up in Waw and when i launch it from the map manager it still sits at the same screen from Waw without mods. What do i do?

When i download a map on my new computer it will download but will not show in WaW. I downloaded 1 from the UGX map  manager it didnt show up and it went to the community maps and downloaded two but one said it was currupted and the other didnt show up.