If you can see the banner of a burned game in the disc channel it means your Wii IS capable of reading\playing backup discs. Loading an actual game from the disc channel will not work though (not without darkcorp or some next shit damystery man is working on). However, neogamma should be able to load the game, what error specifically are u getting? What game u trying to load (be sure to mention region)? What region is your Wii?
In any case, I recommend u look into usb-loading, disc loading is pretty outdated in terms of backup loading