Sound in 10.1 RC3

Hi, Just been playing around in the RC3 beta. I put it on a running 9.3 system that had a working sound system, but under rc3 it is not working. Going thru the YAST sections seems to show a working system but no sound. I have gone to the mixers to check the volume settings. Any hints? this is a AC97 onboard sound sys. PeterB