after adding a lot of stuffs, I tried it again, then suddenly it crash. So, I was creating my own map (with black hawk v4 mod) called 'Operation Gothic Serpent (Mission Code Word - Irene)' - (FAMOUS for the MOVIE BLACK HAWK DOWN) after about adding +800 plus objects, I tried the map, then it WORKS!, so I decided to close the game and add more stuffs in the map because MOGADISHU is a really big place.
