Alsamixer not working

[Diss]

Hi
I am running ubuntu dapper and sound works except for system sounds

If i try and run alsamixer (or aslamixergui) i get this:
alsamixer
alsamixer: function snd_ctl_open failed for default: No such device

I use nvidia onboard sound (OSS) which works fine except for system sounds. I tried this :

========================================================
sudo killall esd
sudo cp /etc/esound/esd.conf /etc/esound/esd.conf_backup
sudo gedit /etc/esound/esd.conf

* Find this section

...
auto_spawn=0
spawn_options=-terminate -nobeeps -as 5
...

* Replace with the following lines

auto_spawn=1
spawn_options=-terminate -nobeeps -as 2 -d default

* Save the edited file

sudo apt-get install libesd-alsa0
sudo gedit /etc/asound.conf

* Insert the following lines into the new file

pcm.card0 {
type hw
card 0
}

pcm.!default {
type plug
slave.pcm "dmixer"
}

pcm.dmixer {
type dmix
ipc_key 1025
slave {
pcm "hw:0,0"
period_time 0
period_size 2048
buffer_size 32768
rate 48000
}
bindings {
0 0
1 1
}
}

* Save the edited file

sudo ln -fs /usr/lib/libesd.so.0 /usr/lib/libesd.so.1

System -> Preferences -> Sound
Sound preferences

General Tab -> Sounds for events (Un-Checked) ?????? SEE NOTE (not sure what this refers to)

* Save and close all opened applications, Reboot computer

NOTE : I HAVE "PLAY SYSTEM SOUNDS" AND "ENABLE SOFTWARE SOUND MIXXING (ESD)" BOTH TICKED

=======================================================

But still no system sound


Any suggestions?

Many thanks

Diss