Black image in Wii's message board

[Rebarbaro27]

Hi,
My problem is pretty simple.
I have browsed a lot but I didn't find anything about this problem/topic. So, I'm sorry if I missed someone else's post.
Anyway I have just 100% completed Super Mario Galaxy 2 and the special message from the staff is appeared. The problem is that the image is completely black.
I don't actually care that much about the image, but of course if there's a solution to this if would be great!
If not... I hope to be at least useful reporting this issue.
Thanks in advance for any response.
My message:
   
The image on Dolphin:
   
What it should be (original Wii):
   

[JosJuice]

You need to have a certain graphics hack deactivated when clearing the game. It's probably Store EFB Copies to Texture Only, or possibly Store XFB Copies to Texture Only.

[Rebarbaro27]

Thank you for the quick response.
Luckyly I had a savestate and I completed again the game with both hacks deactivated and now the image in the letter is as it should be.
Thanks again for the help.