Soundcard problems

Hi, my soundcard was auto-configured and works fine. Unless I change the user in KDE. Then, I have to go to yast, delete the soundcard from the soundconfiguration list. Then I add a new soundcard which is recogized well and installed. After that, the sound works again. The soundcard is aVT8233/A8235/8237 AC97 Audio Contoller Type. Any hints, what to do? Thanks Klaus