need help cant play game on dolphin emulator

[gamesfan]

hi im new here and i just installed the dolphione emulator it says its version svn revtsion 4771. and i extracted the game called darkened sky onto it its 4 playing gamecube games so i extracted the game untill i seen the iso which is what i needed i then launched the game via the emulator great it said english dutch or french in my case english. so then i clicked english then the screen went black and nothing else happened any idea as to why this happened im running windows 7 64 bit and over 4 gigs ram. ive got sega mega drive and super nintendo emulatotrs all going fine. plus the mame 1 as well. i thought it would be ok as the game launched as i said i clicked english then black screen.