I had a similar problem.

How I solved it:

1. Logged out of forums. Closed web browser.
2. Open up a new web browser and delete all history, cookies etc.
3. Go into toribash folder/customs/and delete your profile.
4. Log back on to toribash forums and try to upload kiai sound (5 seconds or less)
5. Preview it. Should work. Worked for me.