i had the same problem... i just bought an N-card. when i first bought it, it had the 1.23a version... i upgraded it to 1.45...
but the problem still there... every time i restart my ds.. the save file was gone... and i had to start all over again!
is there anyway to fix this? or is there something that we supposed to do before we can start saving games?
i realized that the N-card 1.45 version had the AUTO detect save... but it doesn't seemed to work... do we have to try one by one until we get the right save format?
please reply!!! i want to start playing my ds!!