sonic and sega all star racing

Can anyone help please. I downloaded Sonic and sega all star racing for my ds (with R4 sdhc card)and patched it using arm 7 and Dslazy etc. but it still does not work I just get a blank white screen please help any ideas would be great as my grandson is desperate to play thanks mary

It only works on a few cards. Currently there is no universal fix for all cards.
http://forum.romulation.net/index.php?topic=35003.0