Files "c:\program files (x86)\steam\steamapps\common\arma 2 operation arrowhead\@fallujah1_2\addons\fallujah1_2.pbo", "c:\program files (x86)\steam\steamapps\common\arma 2 operation arrowhead\@fallujah1_2\addons\fallujah_hou1_2.pbo" are not signed by a key accepted by this server. To play on this server, remove listed files or install additional accepted keys. Any idea guys? Have the same problem with lingor island.