No sound on ASUS P5Q SE Plus

[muy]

hello

my config:

CM-ASUS P5Q SE Plus

Intel Core 2 Duo E6300 (1.836 GHz)

6Go memory

Graphics card Geforce Winfast PX8600

So, I installed Lion Mountain a few months now and it runs smoothly. I did not care for the sound part.

I want to use Final Cut and I have absolutely sound. And then I realized that I did nothing.

In the the System Preferences, it says "No output device detected"

On this motherboard, the sound is controlled by a VIA ® AVT1708s, 8 channels

Have you any idea?

Sorry for my English. I write from France