Sometimes Nintendont has trouble creating the virtual memory card on certain storage devices, and this causes it to crash and turn off the Wii. This was the issue for me and I think it is probably this issue for you too considering nintendont worked on a different flash drive you had.
In this...
Hello xflak sorry to bother you, but I installed this with base 58 in slot 252 and it didnt work for me. When I set game ios to 252 in usbloader gx it refused to boot games and would just send me back to sys menu