Can't Play Sound
You've added sounds, but you can't play anything...  There are a few things you can check here.

1. Are the speakers on and plugged in?  (Sorry, management made us ask.) 
2. Can you play a Wave file through Windows or  another sound application?   If you can't there may be a problem with your sound card's configuration or drivers.  Refer to your sound card documentation to try to figure out what is wrong.
3. Load the volume control that came with your sound card and make sure that the Wave device is turned up and not muted.
4. Another program may be using the sound card at the same time (May happen with older versions of Windows.) 
5. Update or install your sound card's drivers.  Check their website for the latest drivers and documentation.