No sound on Vista

[satimis]

Hi folks,

KVM
host OS - Debian 5.0
vm - Vista Ultimate

I succeeded installing Vista Ultimate on a VM with following commands;
satimis@vm0:~$ sudo virt-install --connect qemu:///system -n vm26vista -r 1024 --vcpus=2 -f /home/satimis/VM/vm26vista.qcow2 -s 18 -c /dev/cdrom --vnc --noautoconsole --accelerate --network=bridge:br0 --hvm


Vista is running but without sound. I have been googling a while without result. Please advise. TIA


B.R.
satimis