Can't delete private folder to try a different version...need help please

I'm trying to do the bannerbomb thing but none of the aad files are working. I was going to try two more but it says I can't delete the private file because it's write-protected and it never said that for any of the other ones. Plus i need help on the bannerbomb thing because I think I might be doing it wrong. Will someone please help.

Turn off the write-protection switch. Its on the side of the SD card. I was having this same problem when i first installed homebrew with the twilight hack, and now I'm fine!! :D

if it isnt the write protection switch on the SD card, try the software "unlocker" to delete undeletable files. really good piece of software.

i deleted it and tried a different one and it still doesnt work. can someone help me with the bannerbomb thing please. it seems like its going to work but then it says the "can't open .dol" error

Do you have the hackmii installer in the root directory of your SD card named boot.dol?