Sputt, there may be an issue with the file transfer program you are using, be it wireless or wired. Have you tried multiple ways of transferring the files?
Also for everyone else, SMALL caution on multiplayer. I do believe that if both people have the hack it will work. But with only one person with the hack, it with revert the hacked files back to normal. I have not received ban or a notice that I have been using a hack. 1-player multiplayer does work (I know because I cleared almost every set of dungeons already) but 2-player does not... Although I have not tested it with two people using the hack in the same room, I don't believe it will work because of differing files.. Always worth a try tho! If someone wants help of more info feel free to message me and/or add me as a friend on PAD, ID is 393,891.362.