nds games not working please help

it seems that every game i download from this site is not working,i keep getting the same message ....save data cannot be accessed. why is this ,is it the games that are faulty or is it something im not doing? please help

your flashcart firmware needs updating, or if you are using an emulator, you need to chance the save type.

thanks for replying ,how do i update the firmware on my n5card.

ive updated the files on the card but am having the same problem.....save files cannot be accessed .it seems to do this on all newly released games

the company that owns the n5 is hardly updating the firmware or you need to be more patient as they may be making a big release, the r4 III is supporting much more games than the r4 :) :P, thats proof. and the firmware updates almost every 2 weeks

Ah, tanks for the update tips :)
I'm using an Edge linker, and i was having sav error on some games. Weird. I never had any of these. was someting chage or ?