I just recently bought a kia sound and uploaded a song to kia sound that is 4.687 seconds long and is not a .MP3. I have tried /dl and talked to administrators(That didnt help in anyway..) but still cant get it to work.
And yes i tried it in multiplayer..

It should work because it's succesfully uploaded.

1. Are you using newest version of tb? (or at least not some ancient one)
2. /dl yourself again, go into your toribash folder/custom/sketchyguy, there should be kiai.ogg there. If there isn't one, it's a problem with your downloading customs, otherwise it's problem with playing the sound actually. If file is present, check next steps:
3. Make sure you don't have volume down in setup->options
4. setup->utils->sounds, make sure all things are checked

If it's not enough to help we'll think further