If you could hear the sound, then you are set. However, if your computer already plays some sounds, and the browser asked you if you wanted to save or open the file, (or you got any other message) then you need to install the FREE Real Audio Driver. Installation is VERY simple. Download RealAudio Driver Here
Testing Colors...
Yellow:
Red:
Blue:
Green:
Orange:
Purple:
Turquoise:
Lavender:
If you can see all the different colors, then you are set. If not, you might need to reset your display/monitor settings to 256 colors or higher or upgrade your computer system.