First, I don't recommend using the WBFS. See the link in my sig to the guide for FAT32 loading.
Anyway, you need to delete the following files:
Then download the latest WiiFlow (currently r417) from here, rename the file to boot.dol, and place it in SD:/apps/WiiFlow/. Also, your mod is slightly out of date, so if you want the latest and greatest, follow the Softmod ANY Wii guide (link in my sig) starting with the spoiler titled "Softmods with HOMEBREW CHANNEL installed."