Always try dios-mios-booter r30 ( press the -(L) Button for USB Device with dios mios booter) and DIOS MIOS 2.2 wad install with Wad Manager to IOS236, first try from HBC, if it works then you could try the other USB Loaders like WiiFlow r663, CFG Loader r45, or USB Loader GX r1202, usbloader GX r1202. IF you are having issues check your USB Loader settings, sometimes removing the configuration settings file in wiiflow app and GXGameSettings.GFG file in usbloader_gx app gets rid of the issues....
check out the guide-dios-mios
USB1, FAT32 with cluster size 32kb, active, primary and first partition of the hard drive.
GC games in USB1/games/GAMEID/game.iso
(DIOS MIOS will not work if your hard drive is not FAT32 or cluster size is more than 32kb or USB2 or 2nd partition of hard drive)