Hello. This is my 1st post ever on a forum. I had the same problem: used hackmii with LU64 on a 3.4 U and worked beautifully. Then run a tutorial to upgrade to 4.0 to 4.1. So far so good. Then applied Dop-IOS changes and my HBC got upside down and USb loader would not recognize the USB drive. I tried to reinstall hackmii (that in turns installs HBC) but it gave me the v0.6 message crapp. I thoughby Cello - Getting Started