Windows 7 and sound [closed]

[WGH]

I've just installed Windows 7 (7100), my previous OS was Vista. Everything is working like it should except UT3.
There is no in-game sound in UT3. But intro movies have sound. I can't play sounds in editor too.
All other games don't have such problems, I haven't tried other UE3-based games though.

Any suggestions?

Uh, sorry, never mind, forgot to install OpenAL.