Marvel super hero squad and Planet 51 not working after replacing Arm 7 File!!

Please help!!!
I am trying my hardest to solve this myself but am stuck!

I have a ds one supercard with latest updates. Downloaded these 2 games and cars race a rama for my son.

None were working as I was getting "cannot acess save data" on them all. I have unpacked them and replaced the arm 7 files on them with one that is from a rom that works.

Planet 51 now open but freezes after entering profile info....and nowmarvel super hero just gives me 2 blank black screens
Any ideas of anything else to try
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Have looked all over the internet now too!! no joy!!
Pls help!!!