I have a Wii U with a softmoded vWii. I have been playting my backups from a external HDD and it have been working flawless. Now (for some reason) when I try to start USB Loader GX it just opens, I see the logo, then the screen turns black and goes back the vWii menu. What can be wrong? Why doesnt it start? I haven't done anything special at all, it just stopped work from one day to another.