r4 freezes- create sav file

hi
i have a r4 card which i bought a couple of weeks ago and put new software on. i downloaded and played lots of games, no problem. but since yesterday every game i have downloaded, when i try to play it says on screen "create sav file" and just freezes on that screen. all the other games work fine just the ones since yesterday.can anyone help, i'm not very technically minded so easy answers please
thanks
caitylou

What type of R4, and what game ?

hi
it says r4 sdhc upgrade and i got software from their website where i bought card and it is bomberman 2 , sega casino, big puzzle and garfield a tale of two kitties, basically everything i tried to download today
thanks
caitylou

Keep checking the R4SDHC website, they do update there kernal very oftenThis website get all the latest http://www.linfoxdomain.com/nintendo/ds/