Make sure you're using the 4.2 Bannerbomb, and make sure you're using it correctly.
You have to go to the SD Card menu to use it (the little 'SD' icon near the 'Wii' icon).
hey BUDDY, don't double post, u have 10 people answering ur questions on 2 threads, don't flood with duplicates, otherwise next time i wont waste my time with helping u