Very dumb from me...Things to try.
1. rename gameconfig2.ini to back it up and have wfl create a new one.
2. delete or rename dev:/wiiflow/cache/lists folder to make wfl create a new one with new lists.
3. go to main settings>startup settings and try changing force cios on or off.
4. select a game and go to game settings and change the IOS to 250 or 251.
5. depending on the region of your console or games you may need to change your video mode per game.
I attached the HDD on the Front USB Ports....
On the Back Ports,everything is working fine with 249....sorry for my Dumbness....