First, put all of your money into your ABD. Then save - go to the Wii menu - settings - date and time. The change the date to +11 years. Go back to ACCF and you will get a letter from the ABD saying you have gained interest. Keep on doing this until you are satisfied with the money you have. When you cant add +11 years anymore,go to the right year, go into ACCF, play for a second, then save and reapeat the process.