g generation over world can`t load or save

[imjh11]

hello there, i tried run g generation over world by 3008, it just runs fine, but when i tries to save or load game, it dosen't work.
when i tried load my old games from psp, it gose back to main menu.
and when i tried save my game while play game, it gose back to game menu.
what is problem and how can i solve this?>