Hey guys, My M3i Zero card won't work on my dsl. I've followed the instructions and it works perfect when I put it in a DSi, but I get the "no ds card inserted" in the ds light. If I move the SDCH into a M3 card it works, so there's no problem with the system files. Do you think it could work if I use pre 1.4 core firmware? Are these available for download? Thankful for any help!