I had uploaded a YouTube video about this a few months ago:
http://www.youtube.com/watch?v=sNLVBTiwudU
In the description it is listed what I had to change.
"For this menu to work, I had to change the following settings in Dolphin:
1) External Frame Buffer (Disabled) -To- External Frame Buffer (Enabled) [Virtual]
2) DSP HLE Emulation (Fast) -To- DSP LLE Recompiler
3) Skip BIOS Un-Checked in GameCube Tab of Config"
http://www.youtube.com/watch?v=sNLVBTiwudU
In the description it is listed what I had to change.
"For this menu to work, I had to change the following settings in Dolphin:
1) External Frame Buffer (Disabled) -To- External Frame Buffer (Enabled) [Virtual]
2) DSP HLE Emulation (Fast) -To- DSP LLE Recompiler
3) Skip BIOS Un-Checked in GameCube Tab of Config"
~ AwesomeMarioFan