Hey! I had the same problem and was able to fix it without too much trouble.. made an account to reply to this. Hopefully it will help.
Try this:
1.Hook the cart back up to your PC ala USB.
2. Copy all your .sav files from the cart on your PC.
3. Delete your .sav file from the cart.
4. Stick...
alright guys i just started a blog where i make my essays (not my school essays unless i'd find them something i'd want to post here), and started by copy pasting my essay about the dictionary into a blog entry
Turns out my ancestor was a bit upset about the whole language fragmentation issue, like Soda and Pop... Ask for a pop here in Florida people will look at you funny. Ask for a pop up north and people know what you want lol