I've followed the instruction guide here at Home, using the program WBFS Manager 3.0 on my PC, I've formatted my 8GB USB Key, browsed for my game Paper Mario and clicked Add To Drive. When finished it says Completed Adding Entries to WBFS Drive.

When I open up uniiloader with the USB key in my wii no games come up, just a screen that says Insert a Disc.

Any ideas?
thanks in advance