Hi bought my Wii couple of years ago because wife wanted to outdo sister got it chipped with wii2 key i think!) worked fine but wife never looked at it kids prefer xbox 360.
we have only played handful of times in last 2 yrs but decided to start using it recently but New back ups dont work all i get is message to upgrade with usual warnings about illegal mods etc
the backups i made originally work fine
go to the introduction thread. they wiil give you a link to a guide.... maybe you will need to softmod.