DS help

Ok, I don't know a thing about computers and this stuff, but I do have the R4 for my DS and I am wondering why some of the games are not working anymore. I get a message that says "File not found" or something similar. Is this just a problem with the games and is there a way I can fix it?Thanks!!ALR ???

So...how do I do that...LOL...told ya I know nothing!!

I dont think thats the problem, it sounds more like something is corrupt.

try reformatting your SD card and reloading eveything onto it.