[ Video & Online Games ] Open Question : Help with gamecube emulator?

I have the dolphin gamecube emulator, I dowloaded a rom for the game Custom Robo. When i go to play the rom it says this "Can't create opengl renderer. You might be missing some required opengl, check the logs for more info." Am i doing something wron cause if i am what is the right way to play the gcm file.