Improve your description! Simply saying that you have a page on facebook about this map isn't enough. You must give some information about the map (how to win, heroes included, purchasable items etc...), write a full credits list where you list the creators of the models/icons/skins you used in your map and finally a changelog so that users can keep track of the newest updates. I also highly recommend posting some screenshots about the game as this would attract much more people to download the map.
If you don't do this soon, your map will be REJECTED!