"alsa:open plughw:Permission denied"

Every time I start Xawtv on my 9.3 Suse in KDE 3.5 I get the information "alsa:open plughw:Permission denied". After I click OK everything more or less works but I have the feeling that alsa is not working fully. I have read in the Alsa wiki, Alsa Howto and I googled but apart from someone on an Italian list who seemed to have the same problem I also came to the Suse pdf data where I also did not find what to do. No idea how to work on the plughw and how to make the needed permission . Somebody with a workout?