hmm
when starting the ds hold on the select button,
if that doesn't work do this: keep pressed in: A+B+X+Y when starting the ds untill you get to the neo2/3-sd menu, then update the newest firmware you should have on the ds cart and play the roms, note that using this last method you have to update the neo2 firmware each time you turned you're ds off and back on
flashme 7 is working fine with me(although i have the fat ds, maybe the lite is different)