im trying to uplaod a .wav file to the kiai sound but its not working

What exactly is your problem?

1. make sure that it's less than 5 seconds
2. make sure that it isn't too big
3. sometimes there's some bugs with the uploading, so just wait 2-5 minutes

It can take much longer than 2-5 minutes.

well, if u have an internet speed like mine,
it will take 3 hours xD

and don't forget about if the servers were busy or not...