I actually came across this same problem shortly after soft modding my wii. The way to fix this is while in the usb loader (I use Configurable USB Loader and it works) is to go to the game option and change the iOS for that game. I'm not at home so can't tell you which ended up working for me, but it me took a few tries to find the right one. I think the working one ended in 222.
Hope that helps.