I need help hacking Animal Crossing for the Wii.?

Okay, so, I got the Homebrew channel already installed in on my Wii. Now, I looked up on some sites like YouTube where I can suposubly do the hacking of Animal Crossing. I put the 'App' folder on my 516MB memory card and inserted it to my Wii. I clicked the little install thing on the wii when you bring the homebrew channel up on your wii and then pressed the 'restart' button to start the 'savegame data' thing. It then said 'Error! (ret = -1) I really don't understand this. Help would be greatly appreciated!! thansks <3 Oh, and I was using a 2GB memory card in the begging and since it wasn't working, I used a smalled card.