What map are you using? The server can't load a map that doesn't match the size you're telling it the map is. If you're using a pre ML map, but try to input the ML map dimensions, the server won't load. You have to use another program to make your map bigger before you can use it with cedserver. I'm not sure if that's the problem you're having but it was a problem for me and took me a while to figure out how to fix.