Hi i am having a lot of trouble with my r4i cards. my sons have had the dsi and dsi xl and had one card each that worked, they normally played the r4i card on the dsi which they have had since 2009. they were under warranty and have both been replaced after a bowl of cereal covered them both in milk. i went to the shop and they gave the boys a brand new ones. the r4i works in the dsi xl but not in the dsi. can anyone help me with this. i dont know much about the whole r4i downloads and kernal stuff, but my boys are desperate to get their r4's working again. thank you in advance.