Bought an M3i Zero and when I tried to boot on my DSi XL (firmware 1.4e) I instantly got the nintendo error message after selecting the card... So I thought it must have been a bad flash... I tried to reflash the card however upon putting the file on card and inserting the cable the red light flashes once and thats it. Nothing happens. Now I try the card and my DS doesn't even recognise it not even my old DS lite so its obvious the built in firmware is now corrupted. Please help... I'm pulling my hair out here.. I followed the video off a thread in here and copied all the files correctly and tried with just the F_CORE.DAT on its own on the memory card (formatted fat32). The thing will not flash at all. The arrow is pointed up at the back of the card and everything. Should I send the card back for a replacement? As its now gonna cost me money to send back as I think the card is faulty or the flashing cable is. Note.. I also tried a differnt memory card I took which I was using off my working EDGE card so its definetly not my memory card at fault here.