Corrupted Save File (PSP > PPSSPP)

[exquisity]

Hi guys, i got this corrupted save file error when importing from PSP to PPSSPP; i search the entire forum but can't find a result.

Dissidia > No error; works fine
Dissidia 012 > Error
Knights In The Nightmare > Error

I imported file by file to extact directory: "memstick\PSP\SAVEDATA" etc (all games version tally up; all save data works well and proper on PSP)
Version tried: 1.4-165, 1.4, 1.2.1, 0.9.1 > still error (only dissidia save data works fine)

Please help!
Thank you so much in advance.