PSP Save File Help

[webyugioh]

Please help.
I recently have put a lot of hours into Dissidia and other games on my PSP with 3.90 M33-3.

I then updated to 4.01 inorder to be able to use remote joy and IR shell so I could redirect the screen to my PC.

Now all of my save files will not work,
especially Dissidia.

When I load Dissidia and load my game, it says (in JAP)
Failed to load
The data is broken

It does that same thing on my Gundam vs Gundam game.
And on SuperStarDust is says
Load Failed.
The data is corrupted
(80110306)

Yet, for some reason,
the LocoRoco game (the first one) works perfectly.

I tried to downgrade back to 3.90M33 but it says a higher on is already on and will not do a thing.

Is there any way I can get my save files to work?
Or is there an easy way to downgrade again, hoping that will work ?

Please help, I got really far in Dissidia and would like to not have to start all over again.

Thanks
-Webyugioh

 

[lolzed]

first of all,wrong place,this is blog not the psp section,second,how do you update(sorry for being of topic),and third,this sounds like the ISO is buggy,where ever you got it,did you try using another ISO?I'd appreciate if you answered my question...