alsa: open plughw: Permision denied

On my 9.3 with KDE3.5 I always receive following error message after booting alsa: open plughw: Permision denied The alsamixer gui also does not want to show up with something like only root has the permision for the alsamixergui. I have forced a temporary change there by changing the ownership of the alsamixergui but I am sure that is not the correct Linux way. The none working of my Kmail notifications are surely also caused by the permision case. Where and how can I instruct alsamixer to work with the local user? Is there some place to do that or do I have to edit some configuration file?