as @ Mami Tomoe: said, only from CS2D official website and try to make your graphics some lower, graphics don't play a big role in the game as i see, it will be better to make it low/medium, i hope it helped
I've download the official CS2D and reinstalled it, after that my CS2D not having a large lag spike anymore. Maybe the file i download from cs2d.com is corrupted. And also thanks for the answers