I am having problems too:
when I load wii64 via HBC, it loads to bootmii...
I have bootmii installed as an IOS as I cannot as boot2
Is that the reason?
Might I have an IOS conflict? as HBC, bootmii, and DVDx (I think), are installed using IOS36 (based on the most recent update of HBC via hackmii installer)
EDIT:
I figured it out: apparently I am a dinosaur on version 3.2U and a wiikey2 modchip:
I can only use DVDx with such modchip if I preinstall patchmii (which creates a custom IOS 254). Then, DVDx uses this IOS 254 to install the DVD stub.
The problem is: bootmii as an IOS installs as IOS254: thus blocking my wii64 from executing correctly: It when selected under this circumstance loads: you guessed it: bootmii.
So I have to choose between appropriate DVDx function on version 3.2U OR bootmii as IOS: which seems to be useless as an IOS anyway for brick protection