The part about the corrupt message throws me off a bit. There has always been a problem opening Homebrew channel with bootmii so that's normal. As far as you not being able to load apps from bootmii makes no sense. I wonder if you're trying to open the apps the correct way for bootmii as you don't access them from the apps folder like you do with Homebrew.
If my assumptions are correct, I think you may have either a bluetooth issue or wi-fi issue. Can you power up with the wiimote?