I had a R4 SDHC card with heaps of games on it, they all worked perfectly. when updated my dsi to the version 1.4.5A all the games stopped working. now when I try to open it it says An error has occurred. Press and hold the POWER Button to turn the system off. Please refer to the Nintendo DSi Operations Manual for details. How do I fix this? Do I have to change the firmware, if so which firmware will work?