Omg help plzz for accf

[Sora1234]

Um... I used the Actoolkit, and it worked and I used it to install item's and land, but after I did it again after about 20 days.The following happens. I installed the savefile, and on the game it says that the Animal Crossing cannot be loaded, because the save data is corrupted please help someone.

Hm...Are you running any codes? I remember, using the museum code, and it then said the Animal Crossing Save was corrupt. Here is what you should do.

1.Take off, or don't activate cheats.
2.Did you backup your Rvforest.dat file? (Upload it here)
3.Try to reinstall the save.
4.Post here what you changed exactly, using ACtoolKit.
5.Try to backup your Sd card , and reformat it, after you save all the things on it, on a computer.