no sound on cf15 but yes system sound

[Zoran Spasojevic]

I just installed FC15 with the latest updates.
I am using M-Audio audiofile 2494.
I get the system notifications sound but none of the audio or video 
applications produces sound.
I tried using alsamixe and  considered various suggestions I read on 
these lists but still don't have sound..
When I try system settings > Multimedia and click on "test sound" 
button, the reply I get is that the sound card
does not work and it seems that it can not be detected by pulseaudio or 
various other applications.

Thanks in advance for any help.
zoran