Can't read data (NDS game on R4DS)

Hello.
I have R4ds for my son and any nds game I downloaded lately, some how it says can't read data...any suggestion? to fix this problems?thank you in advance.

update your firmware.

Replying to #2

Where and How should I do that?Thanks

download the latest firmware from www.linfoxdomain.com/nintendo/ds, extract the files and copy them to the root of your microSD card, overwriting the ones already present.

Replying to #4

it worked..
two of my sons say "THANK YOU SO MUCH"HAVE A WONDERFUL AFTERNOON