[wii games] failed to load and play.

I have downloaded some wii games, and burnt into the DVDs, each DVD has only a .iso file. When I inserted the DVDs into my wii console, its failed to load and I got an error 927. May I ask how can I play these games with my modded console? What software should be installed into the wii console before playing these games? I am now using an "emulator/software" with name "Neogamma R3, an figure looks like HULK". Please help, thank you very much.