Sound Bug?

[CivSavage]

I imported several .wav files into wc3 (unreal tournament sounds) and only two of them will work when i do 'use sound', but they are just wav files like the other ones. Why won't can't i use all my sounds?

 

[Maker]

Are they 22050 Hz mono, 16 bit?

What action do you use to play the sound?