I have this same problem, I’ve found that if I slap it vigorously it eventually just accepts the disk. However I’d rather not beat the crap out of my wii every time I want to play a game, so I opened it up to see if I can fix the problem and I have figured that there is an issue with the motor that spins the disk. I know this post was from last year, and you’ve probably already resolved this issue in one way or another, but if you have any advice I would love to hear it. Thanks.