[newbie] System Sound

[nestar]

Hello
I setup my sound and i clearly hearing sound from linux.
so i going to setup system sound, I set system sound for "logout""logout
message" "close windows" and also i test sound for all this system.
my testing sound is ok but when i login and logout i didn't hear any sound
from linux. please help how can i hear sound from linux ?
how can i add sound icon in my status bar ?

please reply.
satyajit