I bought an R4i 3DS for my friend's daughter for Xmas which was purchased from www.zhuzhuchina.com and appears to be one of the problematic (www.r4ids.cn) Revision C cards. But that has not been an issue because she does not have a 3DS and does not require a newer firmware for compatibility with her DSi XL. The R4i card has version 1.4.5U and displays the Metroid Prime Hunters Demo icon. Up until just recently, it has been working well with her DSi XL. Unfortunately, something has changed and now whenever the Metroid icon is selected the DSi displays the "An error has occurred..." message. To my knowledge, no one has tried to update or change anything on the inserted micro SD card. I've tried loading firmware updates, but keep getting the same error message, without being able to select anything. Is there an easy fix for this, or has the card failed? It doesn't need the most recent firmware, just something to get it working with the DSi once again. I'm not very familiar with flashcards. Any help would be appreciated. Thanks!