I recently attempted to install the Homebrew Channel in Wii Mode on my 8 GB NTSC-U Wii U system, running the latest firmware, but I ran into a bit of a snag. I extracted the HackMii installer files (boot.elf, etc.) to the root of my freshly-formatted FAT 1GB SD card, as well as copying over the "private" folder to the root directory from the Smash Stack zip file, and attempted the exploit. I inserted the disc in my system, switched it over to Wii mode, then started up Brawl. After I was at the main menu for the game, I inserted the SD card into the Wii U, went into the stage builder, and selected the option to check the SD card. After doing so, the system hung, no input registered, and my console emitted a loud humming noise. I was unable to get it to shut off by using the power button, so I was forced to pull the power cord to get it to restart. Does anyone have any idea what the problem might be?