Parauk

Evening All, I have been hosting my own servers for a long while now and can host them all without a problem except for the Sinai map. As soon as i try to host it the Sinai map is grayed out on the web gui and will not allow me to host it. am i doing something wrong no such issue with any other map only Sinai. Any idea on what to check or change would be great , Many Thanks in advance.