Emulator Problem: Dolphin is making sound but the window reamins black

Hello!
I'm currently using a Dolphin SVN R 6197
I'm trying to play The Legend Of Zelda: The Wind Waker but it only makes the sound of the game but the window remains black.
Please help me
Thank You

I'm no expert bit it sounds like it could either be your graphix config, or a bad .iso.