save data problem on R4

Hi all

I have got a R4 card 4 my daughter I have put lots of games on which work fine but some say the save data could not be accessed...................
Please can someone help cos I aint right clued up on these things

kind regards

Some games you cant save its just the way it is.

As long as you have the folders all placed out e.g.

http://img407.imageshack.us/img407/4699/entpdacq.jpg

And as long as the games folder doesnt contain any other folders and only the nds files then everything should be okay, when you start placing folders in the games folder it seems to corrupt some games and the save games.