sound stopped working

[Dick Brown]

Hi all,
    I'm quite a newbie, so please bear with me. 
    I don't use sound too much, so I'm not sure when this happened, but 
my sound stopped working.  I'm using KDE 3.1.4-5, with FC1, although I 
don't get any sound with Gnome, either.  I have found that other users 
are getting sound, however.  I've gone into the KDE control center and 
turned on all messages.  Now, when I log in, I get the following message:

Sound server warning message:
Can't set real-time scheduling priority.
You need to run artswrapper as root or
setuid root. This means that you will
likely not be able to produce acceptable
sound (i.e. without clicks and breaks)

I've run 'ps -A' and can't find artswrapper running at all.  I've also 
googled for a solution, but all I've found so far are lots of others 
with sound problems.

Recent modifications (I don't know if these were before or after the 
sound problems) include:
java installation
normal up2date updates

Thanks for any help,
Dick