Flash Player Sound

[Per Anton Rønning]

I thought my recent Java trouble had bearing on this, but it seems not:
When I play a YouTube video I get the pictures, but no sound.
 I have checked the sound gauge embedded in YouTube and this is on top. 
When I play CD/DVD I have no sound problem at all . The shockwave player 
is installed,
I thought that was what I needed. I may be wrong, can someone tell?

Brgds
PAR