I read and searched so many post I don't know what to do next! Maybe someone can help me solve this riddle?!? Scenario: - NDS lite - Brand new M3i card - Brand new 4GB SDHC Kingston card (perfectly working on PC, formatted with SD formatting program) - Copied on the SD card the "M3_Sakura_1.43X_4.5X" as "system" folder - Copied on the SD card the "F_core1.4" as "f_core.dat" in the root - Inserted the SD card inside the M3i zero - Plugged the USB Firmware updater, the M3i card blinks intermittently for about 30 seconds and then stops (seems fine!) But when I insert the M3i in the DS I always get the "There is no DS card inserted" message! I tried many times, with the following changes: - formatting the SD card with Windows / formatting with SD utility - using latest sakura (1.43x) / using older versions (1.41also with older system software, but always the same result - using a different DS lite (both DS lite work perfectly with an old DSX card and games) Don't know what to think... The M3i zero seems to work fine and performs the firmware flashing blinks, but is never recognised by the DS! What can I try next??