Hey guys, I recently upgraded my DSi to v1.4.1 and now my R4i v 1.4 doesn't work anymore (the website for this card is www.r4igold.cn). I've tried downloading various R4 upgrades and tried upgrading it on a friends DS lite but got the message saying "card check failed. Re-insert and try again". When the card was inserted again, I got the same message. I'm really lost now as to what the next step I need to take is. What should I do? Thanks in advance!