Try removing the CFG files from all USB Loader apps and see if it works because the games were set to use the WBFS partition or update all USB Loaders from computer or Wii wifi to wiiflow v4.0.5 ,CFG Loader r50 replace the boot.dol in SD / apps / USBLoader with the updated one (rename it boot.dol) and R1205_IOS222-249-250.7z, the latest GX is in the bottom of this page USB Loader GX, replace the boot.dol in your SD /apps/ usbloader_gx with the updated one (r1205_IOS249)
Install USB Loader GX -UNEO_Forwarder Channel 5_1_AHBPROT.wad for USB Loader GX channel and Default-FIX94v14b-forwarder-DWFA.wad for wiiflow channel or you may need the full channels I use the forwarder channels. In Wiiflow reload cache and GX try Default Settings. Keep the Video Mode to your region. Also check the games on your USB to make sure the names are in correct format, I keep all my games as .wbfs files in both my NTFS and FAT32 HDD in the wbfs folder.
NTFS Hard Drives - Formatting, Loading, Ripping, Playing