have you moved your userconfig folder from \ArmA2\@ACE into \ArmA2\? you need to create a new folder inside the moved userconig called ACE, and drop all the .hpp files in there final path for those hpp files should be: \ArmA2\userconfig\ACE\ IE: F:\ArmA 2\userconfig\ACE\ace_clientside_config.hpp F:\ArmA 2\userconfig\ACE\ace_keys.hpp F:\ArmA 2\userconfig\ACE\ACE_serverconfig.hpp F:\ArmA 2\userconfig\ACE\ACE_Tracking.hpp