Answer:
Ok, first you go to the the diary. It's the blue book near the bed. You press the "A" button while near it, then you go to your "File" and click. It will say something like "Are you sure you would like to save?" click "A" and then it's saved. You can also just click start and do it, but it's easier to remember this way. Hope this helps. =)
~ Aki
christian: hi. i have some question about it.. i already did what you say. but still i can not save the game. it always says save failed.why?