Looks like you'll have to redump your image off of your discs properly this time around.
Make sure there is no excessive scratches on the disc while dumping. Also don't try dumping the game with your PC's DVD drive as it won't work.
I spent 2 days attempting to dump Super Mario Sunshine, while I was able to dump an image using Friidump, my drive was unsupported so it basically dumped a blank and corrupted iso which had no banner and gave me the Unknown Country Code when trying to start it in Dolphin.
USB Gecko is now the way to go if you want to dump games and have a powerful debugging tool and a way to run homebrew on your Wii/Gamecube.
