You have to make it in a specific sub forum, either competitive, casual, mini game, aesthetic or race maps forum. Understand?
I dont know why it doesnt let you but if you want to post your map ( which is awesome ) you need to go to the community maps thread and find the category your map falls under and click new thread. For help on how to make your post the best it can i attached some links: Links: Embedding Screen shots ( finding url ) --- posted by xX5w33ny70ddXx Map Posting Generator --- posted by voodoo: Link to thread Link to generator Gl, if you need anymore help PM me and I will see what I can do to help PM eguitarplaya33