Please stop bumping threads. And I tried the save converter posted above, and it doesn't work for me as well. You can ask someone to convert it for you or you can just make your own save file. And if I'm not wrong the .duc file is from gamefaqs right?
it's not really helping. I'll give it another shot. I'll just get some random save file from gamefaqs and try to convert it.
EDIT: What flashcart are you using? Are you sure that you converted the save file to the correct type?
EDIT2: Crap, the converter didn't work.
I don't know what kind of save format the Acekard2i uses, so I can't really help. But if it is the same as Acekard2 then for the source format choose "Action Replay Max DS (.duc/.dss)", for the target choose the one with Acekard2 (.sav) IF 2i's save format is the same as 2's.