Spring RTS Engine

I downloaded this map, but after I reloaded the map list, it didn't show up. I checked to see if the file was in the maps folder and everything, and it was, but I couldn't select it to play on since it wasn't there.

When I select this map, it says Access violation, and then it says that whenever I select another map and when I click the reload button. I have to exit the client to fix this. What's wrong with it?