I softmodded my family's wii last week and tried playing a dvd in it and it wasn't detected. The wii was running 4.3U and I went through the soft mod guide. I also done my gfs wii 2 weeks ago and was running 4.3U as well but it was able to play DVDs. Not sure what the difference could be but I'm scratching my head bout this.
Sent from my CM10 Samsung Skyrocket