I bought 2 R4i chips, one for my DSI XL and one for my sons DSI. I loaded the same software on both. When I load mine, everything works fine. When I load my sons, it goes well until I click on a game, then I get "Open Demon0.SYS Error!" I have tried 3 different micro SD cards, 2 different 2GB I already had, then I bought a new 4GB, and had the same results. Whats the business? Also, I don't know if it matters, but the cards say "V1.4" on them, but I know my Kernal DL is correct, otherwise it wouldn't have worked on my DSI XL Sorry if this was handled in another forum...I couldn't find it.