After days of searching and trying out difrent tutorials and tips, I finnaly got sound on my ET, with this tutorial
http://linux-nerd.blogspot.dk/2011/11/wolfenstein-et-fix-for-ubuntu-1110.html
It works well, but now i have "duplucate guid" problems, I have tryed severel time to replace guid from etkey.org, but it still kicks me ! If I start the game without sound theres no problem ! Does anyone have any idea ?